If four molecules of carbon dioxide enter the Calvin cycle (four turns of the cycle), eight G3P molecules are produced and four G3P are exported.
Carbon dioxide molecule (CO₂) enters the Calvin cycle in the presence of RuBisCO enzyme and interacts with a five-carbon molecule named as ribulose-1,5-biphosphate(RuBP). This interaction creates two molecules of a three-carbon chemical named as 3-phosphoglyceric acid (3-PGA).
These 3-PGA molecules, with the help of ATP and NADPH(G3P) are transformed into a three-carbon sugar named as glyceraldehyde-3-phosphate.
One G3P molecule is utilized to create glucose molecule and the remaining G3P molecules are recycled which regenerates RuBP.
Thus, for every four turns of the Calvin cycle, eight G3P molecules are produced and four G3P molecules are exported.
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n a molecule having three pairs of electrons around a central atom and a trigonal planar shape, how many lone pairs of electrons does the central atom have?
Zero, A trigonal planar molecule requires that there are no lone pairs breaking the molecule's parity. This insure that all three atoms exist on the same plane.
What is a molecule?
A group of two or more atoms held together by tempting forces known as chemical bonds; depending on context, the term may or may not add ions which propitiate this criterion is called molecule.
What is an atom?
The smallest unit of ordinary substance forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms called an atom. Atoms are much small, typically around 100 picometers across.
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which alkyl halide would form the most stable carbocation: isopropyl bromide, tert-butyl bromide, methyl bromide or ethyl bromid
T-butyl bromide alkyl halide would result in the formation of the most stable carbocation. The quantity of methyl groups bonded to the core carbon is often associated with carbocation stability.
A halide is what in chemistry?Halogens are a class of chemical compounds known as halides. There are halides in the natural world, and some of them, like salts and acids, are essential to sustaining life. Halides can be found in minerals, organisms, and plants. NaCl, or table salt, is the most widely used halide.
Why does halide group exist?The class of minerals known as halides includes the sodium, salt, and salts of hydrochloric acid. The crystals halite, sylvite, and carnallite are part of this group of minerals, and they exclusively include chloride that has petrogenic significance. Halite, another name for rock salt (NaCl).
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How to write balanced equation when you are only given the reactants. For example, Write the balanced equation for the reaction that occurs when chlorine gas is bubbled through a solution of sodium iodide. (I already know how to balance equations, I just need to know how to find the reactants)
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the balanced equation is Cl[tex]_2[/tex]+ NaI [tex]\rightarrow[/tex] NaCl + I[tex]_2[/tex].
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.
The balanced reaction when chlorine gas is bubbled through a solution of sodium iodide is given as
Cl[tex]_2[/tex]+ NaI [tex]\rightarrow[/tex] NaCl + I[tex]_2[/tex]
Therefore, the balanced equation is Cl[tex]_2[/tex]+ NaI [tex]\rightarrow[/tex] NaCl + I[tex]_2[/tex].
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What is the symbol for hydrogen ion?
how many of which type of orbitals are used to create the hybrid orbitals on carbon in a molecule of ethylene
Hybridization in ethylene molecule (C2H4) occurs due to the overlapping of the two 2s atomic orbitals as well as one 2p atomic orbital of the two carbon atoms.
This overlapping produces four identical sp hybrid orbitals, each containing one electron from each carbon atom. Hybridization allows the bonding between the two carbon atoms, forming the carbon-carbon double bond. The sp2 hybridization of the carbon atoms results in the formation of a linear shape of the ethylene molecule.
The two unhybridized p atomic orbitals of the two carbon atoms lie perpendicular to each other. This results in the formation of a π bond between the two carbon atoms, as the electrons in the two unhybridized p orbitals can move freely between the two carbon atoms.
The linear shape of the ethylene molecule is due to the fact that the two sp2 hybrid orbitals of the two carbon atoms are oriented in opposite directions and are parallel to each other. The two hydrogen atoms are bonded to the carbon atoms through single covalent bonds, forming the carbon-hydrogen single bonds.
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consider the carbon monoxide molecule pictured below. note that the bond may be a single, double or triple bond. what can best be said about the electrons involved in the bond?
A bonding electron is more likely to exist in the domain tagged by Box B because the oxygen nucleus has a stronger enchantment for electrons than the carbon nucleus.
What is Electron?
An electron is a negatively charged subatomic molecule. It can be either free, or confined to the nucleus of an atom. Electrons in atoms exist in spherical coat of several radii, representing energy levels.
What is nucleus?
The nucleus has been plainly described as a membrane-bound structure that includes the genetic article of a cell.
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solubility curves are used to determine if a solution is unsaturated, saturated, or supersaturated at a specific pressure. true or false
Yes, this statement is true that solubility curves are used to determine if a solution is unsaturated, saturated, or supersaturated at a specific pressure.
What do you mean by solubility curves?
The solubility of a solid in a given solvent is defined as the number of grams of the solute required to saturate 100g of the solvent at a particular temperature. The solubility of a given substance at a given temperature can be determined from its solubility curve. Solubility curve can be used to determine the amount of substance deposited when the solution is cooled. Solubilities of different substances at a particular temperature can be determined.
When any solid is in contact with its solution for sufficient time, then the solid will dissolve if the solution is not saturated or solid will grow at the expense of the solution if the solution is supersaturated. In any case, the solubility curve represents equilibrium conditions.
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30. a compound contains hydroxyl groups as its predominant functional group. which of the following statements is true concerning the compound? a. it lacks an asymmetric carbon and is probably a fat or lipid. b. it is hydrophobic c. it is probably an alcohol. d. it won't form hydrogen bonds with water.
A chemical has hydroxyl groups as its main functional group, hence choice c is accurate. Probably an alcoholic beverage. The substance's primary functional group is a hydroxyl group.
Is referred to as either Alcohols or Carboxylic Acids. Because the hydroxyl group has a hydrophilic character, which means it draws water to itself, it dissolves readily in water. The specific group of atoms in molecules that are in charge of the molecules' distinctive chemical reactions is referred to as a functional group. The hydroxyl group is the functional group that has been provided to us, and its functional formula is -OH. Alcohol is the name given to a substance that contains hydroxyl groups. Hence the compound is alcohol.
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what is the change in length of a 3.00cm-long column of mercury if its temperature changes from 37 degrees to 40 degrees celius
The Mercury column will change in length by its linear coefficient of expansion multiplied by its initial length multiplied by the temperature change.
P = 75 cm Hg. Consequently, atmospheric pressure is given by
P= lcos=lcos60=l/2 , l=2P=275 cm, and l=150 cm.
With everything in place, we can now determine the cutting length of the diamond stirrup in our case. The calculation is as follows: bend deduction = (4 arm length) + (2 hook length). The expansion of mercury occurs when it is heated in a column that is not restricted in length. Mercury's linear thermal expansion is affected by the liquid column's beginning height, mercury's changing temperature, and mercury's thermal expansion coefficient. Consequently, the liquid's expansion or contraction as a result of the change
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Let r = x i + y j + z k and r = |r|. Let f = r/r p. (a) find div f. (give your answer in terms of r. ).
The value of div f is (3 - p)/r^p when r = x i + y j + z k and r = |r| and if we assume f = r/r^p.
It is given in the question that, r = x i + y j + z k and r = |r|.
We know that,
f = R/rp
f = <x, y, z> / |<x, y, z>|^p
f = <x/(x² + y² + z²)^(p/2), y/(x² + y² + z²)^(p/2), z/(x² + y² + z²)^(p/2)>;.
So, For finding div f, We need to take partial derivative:
div f = (d/dx) x/(x² + y² + z²)^(p/2) + (d/dy) y/(x² + y² + z²)^(p/2) + (d/dz) z/(x² + y² + z²)^(p/2)
Now, we need to use the rational derivative rule to find the derivatives:
div f = [1(x² + y² + z²)^(p/2) - x × px(x² + y² + z²)^(p/2 - 1)] / (x² + y² + z²)^p + [1(x² + y² + z²)^(p/2) - y × py(x² + y² + z²)^(p/2 - 1)] / (x² + y² + z²)^p + [1(x² + y² + z²)^(p/2) - z × pz(x² + y² + z²)^(p/2 - 1)] / (x² + y² + z²)^p
div F = (x² + y² + z²)^(p/2 - 1){[(x² + y² + z²) - px²] + [(x² + y² + z²) - py²] + [(x² + y² + z²) - pz²]} /(x² + y² + z²)^p
div f = [3(x² + y² + z² - p(x² + y² + z²)] / (x² + y² + z²)^(p/2 + 1)
div f = (3 - p) (x² + y² + z²) / (x² + y² + z²)^(p/2 + 1)
div f = (3 - p)/(x² + y² + z²)^(p/2)
Now it comes like, div F = (3 - p)/r^p.
Therefore, div f = (3 - p)/r^p
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the forces described in the previous 2 questions are called dipole-dipole interactions. how might dipole-dipole interactions help many molecules attract each other?
Dipoles are held together by the attraction between the opposingly charged ends of the different molecules for each other.
The positive end of one polar molecule and the negative end of another polar molecule are attracted to one another by dipole-dipole forces. Strengths of dipole-dipole forces per mole range from 5 kJ to 20 kJ.
When two dipolar molecules interact with each other over space, dipole-dipole interactions are the consequence. When this happens, one of the polar molecules' partially negative portion is drawn to the partially positive component of the second polar molecule.
Between molecules with permanent dipoles, there are dipole-dipole forces (i.e., polar molecules). These forces become stronger with increasing polarity for molecules with identical size and mass. Additionally, nonpolar molecules can develop dipoles as a result of polar molecules, producing dipole-induced dipole forces.
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would decreasing the volume of the container for each of the following reactions cause the equilibrium to shift in the direction of the products, the reactants, or not change?
This leads to the decreasing the volume will shift equilibrium in the direction of products.
Chemical equilibrium is the condition in which the reactants and products are both present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties. In a state of neutral equilibrium, when an external force is applied, the line connecting the earth's centre and the centre of gravity falls within the base of the body.
A product is anything that can be provided to a market in order to satiate a customer's need or desire. It can be an item, a system, or a service that is made accessible for consumer usage in response to consumer demand. An insurance policy is an example of an intangible product because it can only be understood through indirect perception.
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11. what two products may be produced during fermentation of simple carbohydrates? how is each identified in the fermentation test? can you have one without the other?
The anaerobic breakdown of carbohydrates produces alcohol and carbon dioxide.
Carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms, usually with a hydrogen–oxygen atom ratio of 2:1 and thus with the empirical formula Cₘₙ.
Microorganisms employ the fermentation of carbohydrates to produce energy. During glycolysis, the majority of bacteria convert glucose to pyruvate; however, certain species utilize alternative routes. A single carbohydrate-containing basal medium makes up a fermentation medium.
Durham tubes are placed upside-down in the test tubes to monitor gas production, and phenol red is employed as a PH indicator. In order to produce acid: 1. Positive: The medium will turn yellow after incubation. 2-Unfavorable: The incubation medium will continue to be red. When producing gas: Positive: A bubble can be seen in the Durham tube. 2. Negative: Durham tube has no bubble. Yes, various bacterial groups or species have diverse patterns for fermenting carbohydrates.
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which of the following options correctly describe bond strength, bond dissociation energy, and their periodic trends? select all that apply.
As atom size grows, the bond dissociation energy of the halogen family decreases down the group.
The bond strength increases with bond length. A shorter bond results from a greater bond order for a given pair of atoms. The energy needed to dissolve a bond is known as the bond dissociation energy (BDE). The BDE is always positive since the production of a bond releases energy (H 0), but the breaking of a bond involves the intake of energy (H > 0). The weak attractive interactions that exist between the individual molecules of a molecular covalent material are known as intermolecular forces. The bond dissociation energy, or the amount of energy needed to dissolve a given covalent bond, is a measure of the bond's strength. molecules in a mole. Multiple bonds between the same atoms are more powerful than a single bond. I will have the weakest bond strength and F will have the strongest bond when it comes to electronegativity.
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nuclear decay occurs according to first-order kinetics. argon-37 decays with a rate constant of 0.0198 days–1. after 98.3 days, a sample has a mass of 2.14 g. what was the original mass of the sample?
The original mass of the sample is 15g
t = 2.303/k × log a/ a-z
k = rate constant = 0.0198 days–1
t = time passed by the sample = 98.3 days
a - x = amount left after decay process = 2.14
t = 2.303/k × log a/ a-z
the original mass of the sample a = 15g
The mass of a sample of a chemical compound is divided by the quantity of that substance, or the number of moles in the sample, measured in moles, to obtain the compound's molar mass in chemistry. In contrast to molecular properties, a substance's molar mass is a bulk property. The compound. is present in many different. forms, each with a different mass as a result of the isotopes. The molar mass represents the average of these masses. The molar mass is most frequently calculated from the standard atomic weights and is a function of the relative abundance of the constituent atoms' isotopes on Earth. It is thus a terrestrial average.
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write the balanced molecular chemical equation for the reaction in aqueous solution for sodium hydroxide and tin(iv) acetate. if no reaction occurs, simply write only nr. be sure to include the proper phases for all species within the reaction.
The reaction of Sodium hydroxide and Tin(iv) acetate is as follows:
Sodium Hydroxide + Tin(IV) Acetate = Sodium Acetate + Tin(IV) Hydroxide
NaOH + Sn(C2H3O2)4 = C2H3NaO2 + Sn(OH)4
Balanced Chemical Equation:
4NaOH + Sn(C2H3O2)4 → 4C2H3NaO2 + Sn(OH)4
What is an Aqueous solution?
An aqueous solution is one in which water serves as the solvent. It is also known as a water-based solution. Many common chemical substances are dissolved in water, and these are called aqueous solutions. Examples of aqueous solutions include saltwater, vinegar, and sugar water.
What is Sodium hydroxide?
Sodium hydroxide, also known as lye or caustic soda, is a white, solid crystalline substance used in a number of industrial and household applications. It is a strong base that is highly soluble in water and can be used to adjust the pH of a solution. It is also used in the manufacture of soaps, detergents, and cleaning products.
What is Tin(IV)?
Tin(IV) is the chemical name for tin, which is a chemical element with the atomic number of 50. It is a silvery-white, malleable metal that is used in a variety of applications, including alloys, solders, and some electronics.
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which alkyl halide would form the most stable carbocation: isopropyl bromide, tert-butyl bromide, methyl bromide or ethyl bromid
The most stable carbocation would be formed by t-butyl bromide alkyl halide. Carbocation stability is typically correlated with the number of methyl groups connected to the core carbon.
What in chemistry is a halide?Chemical substances called halides include halogens. There are halides in nature, and some of them, like salts and acids, are necessary for maintaining human existence. Halides are present in minerals, living things, and plants. Table salt, or NaCl, is the most popular halide.
What does halide group mean?The sodium, salt, and hydrochloric acid salts make up the group of minerals known as halides. This category of minerals includes the crystals halite, sylvite, and carnallite, which only include chloride with petrogenic significance. Rock salt, also known as halite (NaCl), is the crystalline form of sodium chloride.
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balance the following redox reaction if it occurs in basic solution. what are the coefficients in front of cr and cl2 in the balanced reaction? cr(s) + cl2(g)→ cr3+(aq) + cl-(aq)
The coefficients in front of the reactions are cr =2 and cl2 i= 3.
In chemistry, a solution is a special type of homogeneous mixture composed of two or greater materials. In this sort of mixture, a solute is a substance dissolved in another substance, called a solvent.
The solution is a homogeneous aggregate of 1 or extra solutes dissolved in a solvent. solvent: the substance in which a solute dissolves to supply a homogeneous aggregate. solute: the substance that dissolves in a solvent to produce a homogeneous combination.
The constituent debris of a solution is smaller than 10-9 meters in diameter. Constituent particles of a solution can not be visible to the eye. Solutions no longer scatter a beam of mild passing through it.
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What is the concentration of a ki solution if 20. 68 g of solute was dissolved in enough water to form 100. Ml of solution?.
The quantity is divided by volume it really is dissolved in to get the concentration. quantity concentration amount. = For instance, you may dissolve. sodium chloride, 0.9g.
What is the straightforward meaning of volume?The volume of an item in three dimensions is the area occupied inside its boundaries. It is referred to as the object's capability on occasion..
BriefingNumber of moles per solute (KI) per volume of water (KI + water) is how molarity is defined.
Additionally, we require the molar mass for KI, which is 166 g/mol.
Procedure:The number of moles of KI = 2.08 g/166 g/mol = 0.0125 moles KI
Volume = 279 mL = 0.279 L (1 L = 1000 mL)
Therefore,0.125 moles KI ------- 0.279 L of solution
X ------- 1 L of solution
X = 0.448 mol/L
Another procedure:Molarity = number of moles (KI)/Volume of solution (L)
Molarity = 0.125 moles/0.279 L = 0.448 mol/L or M
Answer: M = 0.448 mol/L
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what atomic or hybrid orbitals make up the sigma bond between o and h in water, h2o? orbital on o orbital on h what is the approximate h-o-h bond angle?
Molecular Orbital of Water is H2O
Each hydrogen atom has a 1s orbital. Two of the O(2sp3) hybrid orbitals and 2 of the H(1s) orbitals combine to make 2 sigma bonding and 2 sigma antibonding molecular orbitals.In H2O hybridization orbitals having the same energy level will combine to form hybrid orbitals.The water molecule has two lone pairs and two bond pairs. Each O‒H covalent bond is called a sigma (σ) bond.H2O has a tetrahedral arrangement of molecules or an angular geometry. This is mainly because the repulsion from the lone pair combination is more than bond-pair repulsion. Additionally, the existing pairs do not lie in the same plane. One pair is below the plane and the other one is above. This bond geometry is commonly known as a distorted tetrahedron.
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how many grams of water will be produced when 1.1 moles of ethanol (ch3ch2oh) are burned completely? enter a number only (no units) and express your answer using three significant figures.
The 156 grams of water that were created when 2.9 moles if ethanol were burned.
What is the purpose of the ethanol?Drugs, plastics, varnishes, polishes, plasticizers, etc. cosmetics are all made with ethanol. Ethanol is utilized in medicine as an antidote for glycol or methanol overdose as well as a topical antiinfective.
To what extent is ethanol toxic?Intoxication with ethanol is frequent in older adolescents and adults. A child's toxic dosage is 3 mg/dL, but an adult's hazardous dose is 5 mg/dL. Children are more likely than adults to get hypoglycemia after a single intake.
BriefingC₂H₅OH + 3O₂ ⇒2CO₂ + 3 H₂O
Given
Took ethanol moles = 2.9
Since 1 mole of ethanol produces 1 mole of water = 54gram
2.9 mole of ethanol produces = 2.9 x 54 g
= 156 gram of water.
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Equilibrium calculations: Using the equation below for calculating the equilibrium constant for the reaction of PCl3 + Cl2 to produce PCs, make the following substitutions for the reactants and products, and recalculate the equilibrium constant, then comment on the equilibrium constant does it favor products, or reactants? [PCI) = 5.0 mol/L [Cl2] = 5.0 mol/L [PC1s] = 0.1 mol/L [PCI ] 0.050 mol/L K= 9.6 x 10-4 [PC13 ][CI] (7.2 mol/L) (7.2 mol/L) For the steam reformation reaction CH + H2O + CO + 3 H2, calculate the equilibrium constant using the formula and concentrations below, and comment on the equilibrium constant: does it favor products, or reactants? What do you think is the industrial use of this chemical reaction?
The equilibrium constant is 12.5
The equilibrium constant of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by means of a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency towards in addition trade.The equilibrium consistent of a chemical response is the price of its response quotient at chemical equilibrium, a kingdom approached by a dynamic chemical device after enough time has elapsed at which its composition has no measurable tendency in the direction of further trade.
Calculations:-
CH₄ + H₂O ---------> CO + 2H₂
[CO] = 10⁻² mol/L
= 0.01 mol/l
[H₂] = 5 × 10⁻¹ mol/l = 0.5 mol/l
[H₂O] = 10⁻² mol/l = 0.01 mol/l
[CH₄] = 10⁻² mol/l = 0.01 mol/l
K = [CO][H₂]³/[CH₄][H₂O]
= (0.01) × (0.5)³/(0.01)×(0.01)
Kc = 12.5
Equillibirium constant = 12.5
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write the chemical equations that show why solutions of al(no3)3, zn(no3)2, and nh4no3 have the ph values that you found?
The chemical equations of the following compounds shows their respective pH. Chemical equations are given below.
Chemical Equations
A equation that consists of reactants, products and an arrow showing the direction of reaction is known as a chemical equation. The equation is said to be balanced chemical equation when the number of atoms of all the molecules is equal on both sides of the equation.
For Al(NO₃)₃
Al(NO₃)₃ + H₂O → Al³⁺ + 3NO₃⁻
Al³⁺ + 6H₂O ⇄ Al(H₂O)₆³⁺
Al(H₂O)₆³⁺ + H₂O ⇄ Al(OH)(H₂O)₅²⁺ + H₃O⁺
pH > 7
For Zn(NO₃)₂
Zn(NO₃)₂ → Zn²⁺ + 2NO₃⁻
Zn(H₂O)₆³⁺ + H₂O ⇄ Zn(OH)(H₂O)₅²⁺ + H₃O⁺
pH < 7
For NH₄NO₃
NH₄NO₃ → NH₄⁺ + NO₃⁻
NH₄⁺ + H₂O ⇄ NH₃ + H₃O⁺
pH < 7
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based on your knowledge of the spectrochemical series, how would expect sf 2 as a ligand to compare to nh 3?
The spectrochemical series of the ligands the more the strong field ligand the more will be the ∆o values so the cyanide is the most strong field ligand and the chloride is the weak field ligand.
What is spectrochemical series?
Common ligands are arranged in an increasing order of their crystal-field splitting energies (CFSE), which is known as a spectrochemical series. The series' strong field ligands are found on the R.H.S, whereas weak field ligands are found on the L.H.S.
What is ligand ?
In order to create a coordination complex, an ion or molecule known as a ligand must donate two electrons to the main metal atom or ion. The Latin origin of the word ligand is the verb to bind or tie. Anions, cations, as well as neutral molecules, can serve as ligands.
[Fe(CN)6]3- -----> 1
[Fe(H2O)6]3+ -----> 2
[Fe(Cl)6]3- -----> 3
According to the order of magnitude of crystal field stabilization energies the order of magnitude of the splitting is given above .
From the spectrochemical series of the ligands the more the strong field ligand the more will be the ∆o values so the cyanide is the most strong field ligand and the chloride is the weak field ligand and the water is in between them so the cyanide complex will have more ∆o value and aqua complex have the second ∆o value and the chloride complex have the third ∆o value in their order of magnitudes.
Therefore, spectrochemical series of the ligands the more the strong field ligand the more will be the ∆o values so the cyanide is the most strong field ligand and the chloride is the weak field ligand.
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describe and explain the heating test of aspirin. what observation was made when aspirin was heated? why?
Heating the aspirin speeds up the reaction time. A vinegar-like smell is produced which is acetic acid.
Describe how aspirin is synthesized?
Salicylic acid and acetic acid can be combined to create aspirin in the presence of a catalyst that is also an acid. Together with the carboxyl group on acetic acid, the phenol group on salicylic acid produces an ester. Nevertheless, the yield of this reaction is little, and it is sluggish. The reaction is more faster and has a greater yield when acetic anhydride is used in place of acetic acid (since acetic anhydride is much more reactive than acetic acid).
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why are boiling points of pure solids usually reported along with pressure at which the boiling point was measured
Boiling points of pure solids are usually reported along with pressure because boiling point is a function of pressure.
What is the boiling point?
The temperature at which a liquid's vapor pressure equals the pressure of the gas.
The temperature at which a pure liquid's vapour pressure reaches atmospheric pressure is known as the boiling point of the liquid.A pure liquid's normal boiling point is one that can only be determined at 1 atm of pressure. Therefore, the liquid's boiling point should always be given along with the pressure it was measured at.The temperature at which a solid transforms into a liquid under atmospheric pressure is known as the melting point of a pure solid.Therefore, melting point is something that is determined by measuring it at atmospheric pressure. Therefore, it is not required to describe the pressure and melting point of a pure solid.Pure solids' melting points are only influenced by the intermolecular forces they contain, not by how much of them are packed into a capillary.Different pressures will produce different boiling points for the same substance. The boiling point of a substance is the temperature at which its vapor pressure is equal to the ambient pressure surrounding it. For example, water has a boiling point of 100°C (212°F) at sea level, whereas at higher altitudes (higher pressures) the boiling point of water is lower.
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b) what is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑mhz instrument?
The chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑MHz instrument is
if ¹H signal observed = 194.0 Hz
frequency = 115 MHz
the chemical shift = shift ( Hz ) / spectrometer frequency
the chemical shift = 194 Hz / 115 MHz
= 1.68 ppm
for the same proton the chemical shift does not change . Thus, chemical shift in part per million of the sample analyzed with 400 MHz, the chemical shift will be same for 400 MHz that is 1.68 ppm.
this question is incomplete , the complete question is :
A ¹H NMR signal is observed at 194.0 Hz ( downfield of TMS) on a 115 MHz instrument.
a) what is the observed chemical shift in part per million?
b) what is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 400.0 ‑MHz instrument?
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Ryan made a mistake when signing his signature on a form, so he scribbles through it, making the signature unreadable. Has Ryan committed fraud?
A.
Yes, because any obliteration of a document is considered fraudulent.
B.
No, because generally obliteration isn’t considered fraudulent since the person is not attempting to hide the alteration.
C.
Yes, because he has done an erasure of a document, which could signal fraudulent activity.
D.
No, because Ryan is most likely underage since he made a mistake on his signature.
No, because obliteration isn't typically regarded as fraudulent since the alteration isn't being concealed (option -B) is correct answer.
What does signing a document mean?Signatures in the plural. One countable noun Your signature, which is simply your name written in your distinct style, is frequently placed at the end of a document to show that you either wrote it or that you agree with what it says.
On a piece of paper, sign your name. Take a picture of your handwritten signature using the camera app on your smartphone. Send the picture to your email address using your phone. After receiving the image, save it to your computer and then add it to your email.
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how many moles of no₂ would be produced from 4.5 mol of o₂ in the reaction below assuming the reaction has a 57.0% yield? 2 no (g) o₂ (g) → 2 no₂ (g)
5.13 moles of NO₂ is produced from 4.5 moles of O₂, assuming the reaction has a 57% yield.
Given reaction:
2NO (g) + O₂ (g) → 2NO₂(g)
2mole 1 mole 2mole
Here,
1 mole of O₂ produces= 2 moles of NO₂
Therefore,
4.5 moles of O₂ will produce
= 2 × 4.5 moles
= 9 moles of NO₂
For 100 % yield, 9 moles of NO₂ is produced from 4.5 moles of O₂
Assuming the reaction has a 57% yield, number of moles of NO₂ produced is calculated as:
% yield= [tex]\frac{ actual yield}{ theoretical yield}[/tex] × 100%
57 = [tex]\frac{actual yield}{ 9 mole}[/tex] × 100%
actual yield = 9 moles × 57 /100
actual yield= 5.13 moles
Thus, 5.13 moles of NO₂ is produced from 4.5 moles of O₂
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Explain why the balls representing fluorine and hydrogen have only one hole drilled in them, while oxygen has two and carbon has four.
Because carbon establishes four bonds to other atoms, whereas hydrogen and fluorine only form one, the balls used to symbolize these elements have four and oxygen has two holes and number of holes represent the number of bond formation, respectively.
Fluorine is univalent, which means it can only create one bond with hydrogen, whereas carbon is tetravalent and can establish up to four bonds. As a result, carbon has four holes while fluorine and hydrogen only have one. Each molecule of HF has one hydrogen atom that may form a hydrogen bond, while the fluorine atom possesses three lone pairs of electrons. The maximum amount of hydrogen atoms can form hydrogen bonds, and each HF molecule will typically form two hydrogen bonds.
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