A hydrogen bond would form between the hydrogen atom in the ammonia molecule and the oxygen atom in the water molecule.
What is bond?
An enduring attraction between ions or atoms known as a chemical bond is what allows molecules and crystals to form. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic attraction of two oppositely charged ions, as in ionic bonds. Covalent, ionic, and metallic bonds are examples of "strong bonds" or "primary bonds," whereas dipole-dipole interactions, this same London dispersion force, and hydrogen bonding are examples of "weak bonds" or "secondary bonds." The sharing as well as exchange of electrons between the involved atoms results in strong chemical bonds.
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Explain how you determined the polarity of all your compounds by first predicting the polarity of water, and then mixing different solutes and solvents to find the polarities of the other substances.
Likes disintegrate. Nonpolar materials dissolve in nonpolar substance, while polar materials dissolve in polar solvents. like vinegar and water. Because they're both polar molecules, they were polar.
What are substance ?The substance is a material that has specific features and a certain makeup. Every component or pure compound is a substance. No physical technique can separate a substance. A pure substance's composition and qualities are fixed.
Which five examples of substance are they?Tin, sulfur, diamond, freshwater, pure sugar (high fructose corn syrup), table salt (sodium chloride), and baking soda are examples of pure substances (sodium bicarbonate). In general, crystals are unadulterated material. Examples of pure components that are essential micronutrients are tin, sulfur, and diamond.
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when cyclopentadiene is treated with tetracyanoethene, a new product results. which of the compounds is the most likely structure of the product?
When cyclopentadiene reacts with tetracyanoethene yields,1,3-dicyclopentadienyl which is a cyclic product.
The reaction between cyclopentadiene and tetracyanoethene is an example of a Diels-Alder reaction, a type of reaction in which a diene (a molecule with two double bonds) reacts with a dienophile (a molecule with two double bonds) to give a cyclic product.
In this case, the diene is cyclopentadiene and the dienophile is tetracyanoethene. The reaction starts with the formation of a cyclic transition state. In this state, the two double bonds of the diene react with the two double bonds of the dienophile, forming a four-membered ring.
After this, the two molecules rearrange and form a six-membered ring, with the tetracyanoethene molecule forming a bridge between the two cyclopentadiene molecules. This rearrangement is accompanied by the release of two molecules of carbon dioxide.
The end result is a compound known as a 1,3-dicyclopentadienyl cation, which has two cyclopentadiene molecules bonded to a central tetracyanoethene molecule.
This compound is thermodynamically very stable, and thus is the major product of the reaction. The image of the structure of the product is attached below.
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Which of the following reagents might serve as the basis for a simple chemical test that would distinguish between pure 1-pentene and pure pentane? O BF3 O Br2 in ROOH, at ambient conditions O Br2 in CCl4, dark O More than one of these is correct. O NaNH2
Aqueous potassium permanganate that has been diluted with carbon tetrachloride with bromine. Pentane and 1-pentane are distinguished by reagents.
How is the test for unsaturation using bromine in a carbon tetrachloride solution conducted?An unsaturation test can be performed using the bromine in carbon tetrachloride solution. Use 100 ml of carbon tetrachloride and bromine to evaluate the unsaturation of a compound when it is insoluble in water. The bromine water turns gray as a result of how the bromine reacts with an alkene's carbon-carbon double bonds. With the help of bromine, an alkene is transformed into an alkane by breaking the carbon-carbon bond.
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2. which pigments did you separate out when you used chromatography. which pigments were more soluble in the solvent?
After doing the paper chromatography the pigments are separated at different levels, these are carotene, green chlorophyll etc.
The lipstick obtained from the bad scene is subjected to paper chromatography and a chromatogram is then obtained. Lipstick is having many coloured pigments as the active ingredients. So this active ingredients separate at different rate depending upon its partition coefficient. The obtained chromatogram is considered as standard and the it's RF values are calculated. Rf values are nothing but the dividing the distance travelled by the solute by the distance travelled by solvent front. The obtained are values are then noted.
The plants consist of different coloured pigments. The primary function of the colour pigments is to absorb maximum frequencies of light and also they can reflect the same. The pigments play their role during the process of of photosynthesis which requires the presence of sunlight. The required amount of light is absorbed by this colour pigments typically the green chlorophyll and several other pigments. These coloured pigments are known as the biological pigments.
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what is the definition of the standard cell potential (e∘cell) ? what is the definition of the standard cell potential ? the standard cell potential is an individual potential of an electrode. the standard cell potential is a potential of the standard hydrogen electrode. the standard cell potential is the cell potential under standard conditions (1 m concentration for reactants in solution and 1 atm pressure for gaseous reactants). the standard cell potential is the difference in voltage between the initial state and the final state.
The standard cell potential (e-cell) is a measure of the potential difference between two half-cells, each of which contains a reversible electrochemical reaction.
It is a measure of the maximum potential that can be achieved when the two half-cells are connected, with no external electrical circuit. The standard cell potential can be calculated by subtracting the standard reduction potential of the reduction reaction from the standard oxidation potential of the oxidation reaction.
The standard cell potential is expressed in volts and is a measure of the maximum amount of energy that can be released when the two half-cells are connected. It is the voltage that is available to power a device when the two half-cells are connected.
The standard cell potential is an important concept in electrochemistry, as it is used to calculate the Gibbs free energy of a reaction, and to determine the maximum theoretical yield of a reaction.
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you have a 10.40 g mixture of table sugar (c12h22o11: 342.39 g/mol) and table salt (nacl: 58.44 g/mol). when this mixture is dissolved in 150. g of water, the freezing point is found to be -2.24 °c. calculate the percent by mass of sugar in the original mixture. (assume the solids dissolve completely; kf (h2o)
15.10% is the percent by mass of sugar in the original mixture.
given;
sugar mass= 10.40 g
nacl mass= 58.44 g
mass% of sugar= 10.40/10.40+58.44
mass% of sugar=10.40÷68.84×100
mass% of sugar=15.10%
Mass conservation is one of the fundamental laws of chemistry. Every time a reaction occurs, the mass of the products entering the reaction and the mass of the products leaving the reaction are the same. The quantity of matter in an object is expressed in terms of mass. Typically, mass is expressed in kilograms (kg) or grams (g) (kg). No matter where in the universe it is or how much gravitational force is exerted on it, mass is a measure of how much matter there is. In contrast to an object's weight, which is a force that depends on gravity, an object's mass is constant regardless of the situation. Your mass on the moon and the earth are the same. You weigh roughly one-sixth as much on the moon as you do on the earth.
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Which of the following statements is TRUE?
A) If N/Z ratio is too high, there are too many protons and the nuclide will undergo positron emission or electron capture.
B) If N/Z ratio lies somewhere below 1, the nuclide is stable. C) If N/Z ratio is too low, there are too many neutrons and the nuclide will undergo beta decay.
D) The valley of stability is the geographic location where many of the known nuclides were first discovered.
E) None of the above is true
None of the above
None of the statements given above are true. So, option E is the correct answer.
If the N/Z is too high, it means that the number of protons is too less. In this case, the nuclide will undergo a beta decay process. It is done to increase the proton count. If the N/Z is too low, it means that there are more protons than neutrons, it will undergo positron emission and electron capture and not beta decay. Positron emission and electron capture increase the ratio, while beta decay decreases the ratio.
If the N/Z ratio is equal to 1, then only is the nuclide stable. The valley of stability is where the nuclides get stability based on their binding energy.
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Which of the following refers to the movement of buffer ions and solvent relative to the fixed support? a. Electroendosmosis b. Isoelectric focusing c. Iontophoresis d. Zone electrophoresis e. Plasmapheresis
The movement of the solvent and buffer ions in relation to the fixed support is referred to as electroendosmosis.
What does the term "solvent" mean?Solvent Case Studies. The usual examples of solvents include acetone, ethanol, water, and methanol. A substance that has the capacity to dissolve a certain solute and combine with it to produce a solution is referred to as a "solvent."
What makes water a solvent, and why?Water is referred to be a "universal solvent" because it has a considerably wider range of natural solvent properties than any other liquid. However, water is not capable of dissolving all compounds. For instance, water cannot dissolve hydroxides, fats, or waxes because oppositely charged particles are not very soluble in water.
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Oxygen gas has an effusion rate of 66 m/s at 288 k. What is the effusion rate of neon gas at this same temperature?.
The Ne gas (also known as neon gas) will release at a rate of 52.17 mL/s.
Graham's diffusion law
According to this, the rate of gas diffusion is inversely related to the square root of the molar mass, or R 1/ M R1/R2 = (M2/M1).
where R1 and R2 are each gas's rates.
The molar mass of each gas is M1 and M2.
How to calculate the defusing rate of neon gas
O2 flow rate (R1) = 66 mL/s
Ne (M1) has a molar mass of 20 g/mol.
O2's molar mass (M2) is 32 g/mol.
Ne (R2) Rate =?
The equation for Graham's law of diffusion is
R1/R2 = (M2/M1)
66 / R2 = (32 / 20).
R₂ = 52.17 mL/s
Neon gas will therefore emit at a rate of 52.17 mL/s.
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In table below, there are descriptions of an experiment on samples of three different chemical elements. Decide whether the element is a metal or nonmetal, if you can. If there is not enough information to decide, choose can't decide in the third column element description metal or nonmetal? 5 ? Element 1 is a shiny silvery-gray solid. Wires are fastened to each side of a 2 cm slab of it, and an ordinary household 9 V battery is hooked up so that it can feed electricity through the slab to an LED. The LED glows brightly. O metal nonmetal (can't decide) Element 2 is a hard silvery-gray solid. A 10. g cube of it is tapped lightly with a small hammer. One corner of the cube breaks off into 3.4 pieces and a collection of small bits. metal nonmetal (can't decide)
element 1 is non metals, Hard Solid cube
Breaks into pieces of small bits when tapped with hammers- Brittle nature
element 2 is metals ,Moderately soft solid (may be soft metal).5*5 cm square with only 1mm thickness (form of sheets) : malleable nature.
On heating, it got softened : good conductor of heat.
METALS:
Metals occurs in solid state except mercury which is liquid form, rest all the metals are solid form. Metals are shiny, hard and strong opaque materials except sodium and potassium. Metals can be cut by knife. Metals are ductile in nature i.e., they can be stretched into wires. They are malleable in nature which can be cut into sheets. They have high density, high boiling and melting points. They are good conductors of electricity and heat.
NON-METALS:
Non-metals are soft/ hard and brittle in nature i.e., they can be break into pieces.
They are not ductile and malleable.
They have low density, boiling and melting points.
They are poor conductors of electricity and heat.
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nitric acid is produced commercially by the ostwald process. in the first step ammonia is oxidized to nitric oxide. 4 nh3(g) 5 o2(g) 4 no(g) 6 h2o(g) assume this reaction is carried out in the following apparatus. the stopcock between the two reaction containers is opened, and the reaction proceeds using proper catalysts. calculate the partial pressure of no after the reaction is complete. assume 100% yield for the reaction, assume the final container volume is 3.00 l, and assume the temperature is constant.
The first thing to do is to find the number of moles of Ammonia, NH3 and the number of moles of Oxygen,O2.
From the question, we are given the following parameters; The Initial partial pressure of NH3 = 0.5 atm. The Initial volume and final volume of NH3 is 2L and 3L respectively. Also, The Initial volume and final volume of O2 is 1L and 3L respectively, the Initial partial pressure of O2 is 1.5 atm.
The number of moles, n of NH3= 0.0446 mole and the number of moles of oxygen= 0.067 moles.
The next thing to do is to do is to find the limiting reagent which is ammonia,NH3.
We can now use the limiting reagent to find the partial pressure of NO.
So, PV = nRT.
P × 3= 0.0446 × 0.0806 × 273.
P= 0.0446 × 0.08206 × 273/ 3.
P= 0.999146148/3.
Partial pressure of NO= 0.3 atm.
OR
We can just find the partial pressure directly from NH3 as below;
0.5 × 2/ 3 = 0.33 atm.
From the balanced equation, 4 moles of NH3 produces 4 moles of NO.
So, 0.33 atm for NH3 = 0.33 atm for NO.
Therefore, the partial pressure present is 0.33 atm.
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for a c-br bond that is oriented with the bromide to the right of the carbon, where does the nucleophile have to attack from?
Electrophiles (electron-deficient species capable of removing electrons from electron-rich centers), such as HBr, attack carbon-carbon double bonds, such as butene.
Who or what is a nucleophile?
By sacrificing two electrons, a chemical species in chemistry known as a nucleophile forms bonds. Any molecule or ion with a free pair of electrons or at least one pi bond is referred to as a "nucleophile." Lewis bases are nucleophiles because they provide
What are an example of a nucleophile?
A reactant known as a nucleophile provides an electron pair in order to create a covalent bond. Typically, a nucleophile has a negative charge or is neutral with one or two donateable electrons. Some examples include H2O, -OMe, or -OtBu. The species with a lot of electrons is a nucleophile overall.
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an unknown gas q effuses 1.75 times as fast under the same conditions as xe gas. what is the molar mass (g/mol) of q?
The molar mass (g/mol) of q: Graham's Law of effusion, Rate1 / Rate2 = square root of (Mass2 / Mass1) Q = 98.5
In chemistry, the molar mass of a chemical compound is described as the mass of a sample of that compound divided by the amount of substance which is the range of moles in that sample, measured in moles. The molar mass is a bulk, no longer molecular, belongings of a substance.
The molar mass of a substance is the mass in grams of one mole of the substance. As shown in this video, we can gain a substance's molar mass by summing the molar hundreds of its issue atoms. we will then use the calculated molar mass to transform between mass and number of moles of the substance.
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The answer is part C is the energy required to break six carbon-carbon bonds the average bond enthalpy of one carbon-carbon bond in benzene. Calculate in gaseous benzene, CoHs (g): Express your answer to four significant figures and include the appropriate units. View Available Hint(s) AH = Value Units Submit
The energy needed to break six carbon-carbon bonds is 5535.1 KJ/mol, which is equal to the average bond enthalpy of one carbon-carbon bond in benzene. 5535.1 KJ/mol is the reaction's average enthalpy change.
How much energy does it take to break a carbon-carbon bond?
Whereas breaking a carbon-carbon single bond takes 348 kilojoules of energy per mole of carbon-carbon single bonds. A carbon-carbon double bond has a bond enthalpy of 614 kilojoules per mole.
What is the general formula of benzene?
Benzene is an important organic chemical compound with the chemical formula C6H6 and its molecule is composed of 6 carbon atoms joined in a ring with 1 hydrogen atom attached to each carbon atom.
With the molecular formula C6H6, benzene is an organic chemical substance. Six carbon atoms linked together in a planar ring, with one hydrogen atom connected to each, make up the benzene molecule. Benzene is a hydrocarbon since it is made up only of carbon and hydrogen atoms.
Equation of reaction: C6H6(g) --> 6C(g) + 6H (g)
H = (6*217.94 + 6*718.1) - (82.9) KJ/mol
H = (5618.04) - (82.9)
H = 5535.1 KJ/mol
Thus, the energy needed to break six carbon-carbon bonds is 5535.1 KJ/mol
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the chemical reaction in which light is absorbed in the photoreceptor causing the chemical rhodopsin to separate between retinal and opsin is known as
The phototransduction reaction is the process by which opsin and retinal are separated chemically by rhodopsin.
What is rhodopsin?
Rhodopsin, as well referred to as visual purple, is a G-protein-coupled receptor and a protein that is encoded by the RHO gene (GPCR). The retinal rod cells' opsin, a protein light-sensitive receptor, is what initiates visual phototransduction throughout rods. Rhodopsin is incredibly sensitive to light because it mediates vision in low light. Rhodopsin begins to photobleach as soon as it is exposed to light. In humans, it takes around 30 minutes to fully regenerate, at which point the rods become more sensitive. Eye conditions like retinitis pigmentosa as well as rare genetic stationary night blindness are brought on by rhodopsin gene defects.
This reaction occurs in the photoreceptor cells of the retina and involves the absorption of light by the photopigment rhodopsin. When light is absorbed, it causes a conformational change in rhodopsin, which in turn causes the molecule to separate into two parts—retinal and opsin. The separated retinal and opsin molecules then trigger a cascade of biochemical reactions that lead to depolarization of the photoreceptor cell and the release of neurotransmitters, which in turn activate the cells of the optic nerve.
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Write the net ionic equation and determine the standard potential for the reaction between permanganate and tin(II). From the potential, calculate the free energy of the reaction.
The net ionic equation for the reaction between permanganate and tin(II) is[tex]5Sn^{2+} + 2MnO_{4} ^{-} + 16H^{+} 5Sn^{4+} + 2Mn^{2+} + 8H_{2} O[/tex] and the standard potential is +1.34 V.
What is net ionic equation?
A net ionic equation is defined as an equation that only represents the ions or molecules that are actively involved in the reaction or those that change.
Explanation:
[tex]MnO_{4} ^{-} + Sn^{2+}[/tex] → [tex]Mn^{2+} +Sn^{4+}[/tex]
The half cell reactions are :
(1) MnO4- → Mn2+ : Eo = +1.49V
(2) Sn4+ → Sn2+ : Eo = +0.15V
Since tin has a lower reduction potential than Mn, the Sn system serves as the anode and the Mn system as the cathode.
Balancing anode reaction : Sn2+ → Sn4+
Balance charge ( by adding electrons) : Sn2+ → Sn4+ + 2e- ----------------(1)
Balancing cathode reaction : MnO4- → Mn2+
Balancing O atoms ( by adding H2O ) : MnO4- → Mn2+ + 4H2O
Balancing H atoms ( by adding H+ ) : MnO4- + 8H+ → Mn2+ + 4H2O
Balancing charge ( by adding electrons) : MnO4- + 8H+ +5e- → Mn2+ + 4H2O -------(2)
The equation that balances the electrons is obtained by combining equations (1) and (2).
[5x Eqn(1)]+[2xEqn(2)] ⇒
5Sn2+ + 2MnO4- + 16H+ +10e- → 5Sn4+ + 10e- + 2Mn2+ + 8H2O
5Sn2+ + 2MnO4- + 16H+ → 5Sn4+ + 2Mn2+ + 8H2O
This is the balanced net ionic equation.
[tex]E^{o} cell = E^{o}cathode - E^{o}anode = +1.49 - (+0.15) V = +1.34 V[/tex]
[tex]We know that \alpha \Delta G^{0}=-nFE_{cell}^{0} Here n = number of electrons transferred = 10F = Faraday = 96500 C[/tex]
[tex]\Delta G^{0}=-10 x 96500 . 1.34 J \\=1.29 . 10^{6} J\\=1.29 . 10^{3} KJ\\[/tex]
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the substitution of the sulfur‑containing alkyl chloride is much faster than the substitution of the analogous alkyl chloride. draw a curved arrow mechanism to explain why.
The substitution of the sulfur‑containing alkyl chloride is much faster than the substitution of the analogous alkyl chloride.
The solvent in which the SN2 reaction takes place has a big impact on how quickly it proceeds. Because of the strong hydrogen-bond interactions between the solvent protons and the reactive lone pairs on the nucleophile, the use of protic solvents (those, such as water or alcohols, with hydrogen-bond donating capability) reduces the power of the nucleophile. A slower SN2 reaction is consequently caused by a weaker nucleophile. Polar, aprotic solvents—those without the ability to donate hydrogen bonds—are those that speed up SN2 reactions.Consequently, a carbocation is created, with the central carbon having only three bonds and a formal charge of 1.The second stage of this two-stage reaction involves the nucleophile attacking the carbocation's empty, "electron hungry," p orbital in order to create a new bond and restore the carbon's tetrahedral geometry.To learn more about SN2 reactions-
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a sample of an ideal gas at 1.00 atm and a volume of 1.62 l was placed in a weighted balloon and dropped into the ocean. as the sample descended, the water pressure compressed the balloon and reduced its volume. when the pressure had increased to 85.0 atm, what was the volume of the sample? assume that the temperature was held constant.
Given in question ;
volume of ideal gas (v1) = 1.62 L
pressure on ideal gas (p1) = 1atm
volume of sample (v2) = to find
pressure of sample (p2) = 85 atm
As the Temperature is constant. Thus, we apply the Boyle's Law ; P₁V₁ = P₂V₂
To find V₂.
P₁V₁ = P₂V₂
(1 atm)(1.62 L) = (85 atm)(V₂)
V₂ = 1.62/85
V₂ = 0.019 L
Thus the volume of sample in ocean is 0.019 L.
What is Boyle's Law ?
Boyle’s law is a gas law which states that the pressure exerted by a gas (of a given mass, kept at a constant temperature) is inversely proportional to the volume occupied by it. In other words, the pressure and volume of a gas are inversely proportional to each other as long as the temperature and the quantity of gas are kept constant. Boyle’s law was put forward by the Anglo-Irish chemist Robert Boyle in the year 1662.
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how many grams of water will be produced when 2.9 moles of ethanol (ch3ch2oh) are burned completely? enter a number only (no units) and express your answer using three significant figures.
When 1.6 moles of ethanol, C2H5OH, are totally burnt, 86.4 g of water, H2O, are created.
The balanced equation for the reaction will be written first. It is provided below.
2CO2 + 3H2O + C2H5OH =
1 mole of C2H5OH interacted to produce 3 moles of H2O according to the above balanced equation.
Next, we'll calculate how many moles of water were created by the reaction of 1.6 moles of C2H5OH.
1 mole of C2H5OH interacted to produce 3 moles of H2O according to the above balanced equation.
As a result, the reaction between 1.6 moles of C2H5OH will result in = 1.6 3 = 4.8 moles of H2O.
We will now calculate the mass of 4.8 moles of water.
Mole of water equals 4.8 moles.
H2O's molecular weight is (21) + 16 = 18.
Water mass equals?
Mass = Molar + Molar Mass
H2O mass = 4.8 x 18
H2O mass is 86.4 g.
As a result, 86.4 g of water were produced throughout the reaction.
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Assuming the octet rule is obeyed, how many covalent bonds will a neon atom form to give a formal charge of zero?.
Assuming the octet rule is obeyed, 0 covalent bonds will a neon atom form to give a formal charge of zero.
Neon follows the octet rule without forming any covalent bonds. The octet rule is a chemical rule of thumb based on the theory that main-group elements tend to bond so that each atom has eight electrons in its valence shell, offering it the exact electronic structure as a neutral atom. A covalent bond is created among two atoms through the mutual sharing among one or more pair of electrons. The multiple atomic nuclei recruit these charged particles at the exact same time. . Whenever the discrepancy in electronegativities of bonded ions becomes too small for transfer of electrons to construct ions, a covalent bond forms.
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what atomic or hybrid orbitals make up the bond between c1 and c2 in propyne , chcch3 ? orbital on c1 orbital on c2 how many σ bonds does c1 have in chcch3 ? how many bonds does c1 have ?
In propyne, C1 has four bonds in the structure ch1ch3; these bonds are made up of atomic or hybrid orbitals. No atom from any compound has ever reached us, although the idea of hybridization has been introduced.
To describe how distinct molecules' shapes differ. According to the "valence shell electron-pair repulsion theory," also known as the VSEPR theory, the sigma bonds made by the hybridized orbitals on the central atom are spatially orientated to be as far apart from one another as possible. The form of the molecule is determined by its orientation. And it is typically noticed that the shapes predicted by this theory match the shapes of molecules that have been actually observed.
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There are hybrid orbitals represented by this picture. They are composed of s p d (number) atomic orbitals, corresponding to hybridization. They have an electron pair geometry of . With bond angles of (If more than one bond angle is possible, separate each with a space). ° . B-For each hybridization type, choose a picture that corresponds to the correct orbital picture and specify the electon pair geometry. ... If no picture matches, enter N. Hybridization ... Picture ... Electron Pair Geometry sp3 sp3d2 sp A ... B ... C C- A molecule has sp3 hybridization with 2 lone pairs. ... The electron pair geometry of this molecule is: ... The geometry of this molecule is: . ... This molecule will have an approximate bond angle of (If more than one bond angle is possible, separate each with a space.): °. D- 1. What is the hybridization of the central atom in BeI2? Hybridization = What are the approximate bond angles in this substance? Bond angles = ° 2. What is the hybridization of the central atom in POCl3? Hybridization = What are the approximate bond angles in this substance? Bond angles = °
Trigonal pyramidal molecular geometry
sp3 hybridization
sp³ - 4 p
There is some information missing. This, I believe, is the original question.
What are the electron-pair and molecular geometries of NBr3? What exactly is nitrogen atom hybridization? What orbitals on N and Br overlap to form these elements' bonds?
The overlap of the __ hybrid orbitals on nitrogen with the __ orbitals on Br forms the N-Br bonds.
The central atom of nitrogen is surrounded by four electron domains. The corresponding electron-pair geometry, according to VESPR, is tetrahedral.
Three of these four electron domains are covalent bonds with Br and one is a lone pair. The corresponding molecular geometry, according to VESPR, is trigonal pyramidal.
The nitrogen atom has a 1 s orbital and a
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if the pressure of the dry h2 is 742.1 mm hg, what is the pressure of the dry h2 in atm? 760.0 mm hg
The Pressure of Dry H2 is 738.2 mm Hg.
The total pressure of an ideal gas mixture is equal to the sum of its component gases' partial pressures, according to Dalton's law of partial pressures, which summarizes this observation.
Water vapor, which is always present above a sample of liquid water, is a byproduct of water evaporation. When a gas is gathered over water, it becomes saturated with water vapor, and the total pressure of the mixture equals the partial pressure of the gas plus the partial pressure of the water vapor. The pressure of the pure gas is thus equal to the total pressure less the pressure of the water vapor; this pressure is known as the "dry" gas pressure because it only applies to the gas itself and excludes the water vapour.Saturated vapour pressure of this case is 3.8 mm Hg.
[tex]Pdihydrogen =742 mm Hg -3.8 mm Hg\\ = 738.2 mm Hg[/tex]
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what element is undergoing oxidation (if any) in the following reaction? ch4(g) 2 o2(g) → co2(g) 2 h2o(g)
The correct option is, (a) C element is undergoing oxidation (if any) in the following reaction The given balanced reaction is ch4(g) 2 o2(g) → co2(g) 2 h2o(g).
A hydrocarbon and oxygen combine in this combustion event to produce carbon dioxide and water as byproducts. Also, a hydrocarbon produces carbon dioxide and water when it is oxidized. Oxidation is defined as the increase of oxygen and loss of electrons, whereas reduction is defined as the decrease of oxygen and increase of electrons.
Carbon (C), an element, is being oxidized in the process. This indicates that the carbon (C) element produces carbon dioxide during oxidation.
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increasing ocean acidification has been attributed to . a. ocean absorption of excess atmospheric carbon dioxide. b. higher evaporation rates associated with climate change. c. changes in thermohaline circulation associated with the pacific decadal oscillation. d. freshwater inputs from melting ice.
Increasing ocean acidification has been attributed to. a. ocean absorption of excess atmospheric carbon dioxide.
In the field of biology, ocean acidification can be described as a process in which the acid quantity in the ocean increases due to an increase in the amount of carbon dioxide in the ocean.
When excess carbon dioxide is absorbed by the ocean from the atmosphere, then this carbon dioxide serves as a reacting agent for acidic compounds.
When the acid amounts in the ocean are increased then this can result in the death of living organisms in the oceans as they cannot survive in acidic environments.
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explain why the boiling temperature of a two-component mixture rises slowly throughout a simple distillation when boiling point differences are not large. discuss the vapor liquid transitions that occur during this process.
Because the specific heats of the two fluids are so different, after one has finished condensing, the other has not quite hit its boiling point, which results in the temperature drop.
What degree temperature of heat is too much for people?People frequently cite a 2010 study that concluded that the highest limit of safety, above which the normal body is unable to cool itself by draining sweat from surface of the body, would be a moisture temperature of 35 C, or 95 F at 100% moisture, or 115 F at 50% humidity.
At what temperature can a person survive?The human body can withstand temperatures as low as 96 degrees Fahrenheit. The temperature at which the body remains to function at.
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an unknown amount of gas occupies 30.0 l at 2.1 atm and 298 k. how many moles does the sample contain? what is the mass if the gas is helium? what is the mass if the gas is argon?
The sample contains number of moles of gas is 0.39 mol. The mass of the helium is 1.56 g.
Given,
Volume of the gas = 30L
Pressure = 2.1atm
Temperature = 298K
R = 0.0821 L.atm/(mol.K)
To find:
Number of moles = ?
Mass of helium = ?
Solution:
To find the mass of helium in the container, use the expression below:
Mass of helium = number of moles x molar mass
Using the ideal gas equation;
PV = nRT
Where,
P is the pressure
V is the volume
n is the number of mole
R is the gas constant
T is the temperature
Substitute the values and solve for n;
2.1 x 30 = n x 0.0821 x 298
⇒ n = 24.4658 / 63
⇒ n = 0.39
Now,
molar mass of He = 4g/mol
Now, solve;
Mass of helium = 4 x 0.39 = 1.56g
Hence, the mass of the helium is 1.56 g.
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metallic iron crystallizes in a type of cubic unit cell. the unit cell edge length is 287 pm. the density of iron is 7.87 g/cm3. how many iron atoms are there within one unit cell?
The iron atoms present in one unit cell are 2 atoms.
What is a unit cell?
The identical unit cells are defined in such a way that they occupy the available area without touching. The term "crystal lattice" refers to the three-dimensional arrangement of atoms, molecules, or ions inside a crystal. There are many different unit cells that make it up. Every lattice point is occupied by one of the three component particles.
Given:
Density of iron, ρ=7.87 g/[tex]cm^{3}[/tex]
Atomic mass, M =55.85 g/mol
Avogadro's number, [tex]N_{A}[/tex] = 6.022 × [tex]10^{23}[/tex]
Edge length of unit cell, [tex]\alpha[/tex] = 287pm or 287 × [tex]10^{-10}[/tex]
According to the formula:
ρ = [tex]\frac{Z X M}{N_{A} X a^{3} }[/tex]
Now put values in the equation=
7.87 = [tex]\frac{Z X 55.85}{6.022 X 10^{23} X (2.87 X 10^{-3})^{3} }[/tex]
Z= [tex]\frac{7.87 X 6.022 X 10^{23 X (2.87 X 10^{13})^{3} } }{55.85}[/tex] = 2
Hence, there are 2 iron atoms in one unit cell.
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what volume (ml) of fluorine gas is required to react with 1.28 g of calcium bromide to form calcium fluoride and bromine gas at stp?
As STP, 1.28 g of calcium bromide must be reacted with 144 mL of fluorine gas to produce calcium fluoride and bromine gas.
Where does calcium bromide come from?
One calcium atom and two bromine atoms combine to make calcium bromide. Calcium bromide has the chemical formula CaBr2 at the molecular level. It has a strong, salty flavor and hygroscopic, colorless crystals in its anhydrous state.
What effects does bromide have on a human body?
Inhaling bromine gas can make you cough, make breathing difficult, give you a headache, irritate your mucous membranes (inside your mouth, nose, etc.), make you feel disoriented, and make your eyes water. It could burn and irritate your skin if you come in contact with bromine gas or liquid.
Briefing:
PV = nRT
where,
P = Presure
V = Volume in liters
n = number of moles of gas
R = Ideal gas constant
T = temperature in Kelvin
Here,
P = 1 atm [At STP]
R = 0.0821 atm.L/mol.K
T = 273 K [At STP]
Now first find the number of moles
F₂ + CaBr₂ → CaF₂ + Br₂
Here 1 mole of F₂ reacts with 1 mole of CaBr₂.
So, 199.89 g CaBr₂ reacts with = 1 mole of F₂
1.28 g of CaBr₂ will react with = n mole of F₂
n = 0.0064 mole
Now put the value in above equation we get
PV = nRT
1 atm × V = 0.0064 × 0.0821 atm.L/mol.K × 273 K
V = 0.1434 L
V ≈ 144 mL
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Which one of the following substances is more likely to dissolve in benzene (c6h6)?.
Carbon tetra chloride (CCl4) substances is more likely to dissolve in benzene (c6h6)
The chemical name for carbon tetrachloride, sometimes referred to as tetrachloromethane and recognized by the IUPAC, carbon tet in the cleaning business, Halon-104 in firefighting, and Refrigerant-10 in HVACR, is CCl4. It is an organic compound. It has an indistinct color and a just perceptible "sweet" odor. At lower temperatures, it is almost incombustible. Prior to being phased out because to environmental and safety concerns, it was frequently used in fire extinguishers, as a predecessor to refrigerants, and as a cleaning agent. The central nervous system can be impacted as well as the liver and kidneys when exposed to high amounts of carbon tetrachloride, particularly its vapor. An extended exposure risk can be fatal.
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