The element with the highest melting point is bromine (Br2). As a result, choice (A) is the right one.
Intermolecular forces: What are they?The attractive and repellent forces that form between the molecules of a substance are known as intermolecular forces. The majority of the chemical and physical characteristics of matter are governed by these forces. Vander Waals forces are the intermolecular forces that hold molecules together.
Intermolecular forces are those that exist within the molecules themselves. Intermolecular forces keep the particles of solids and liquids bound together.
Dipole-Dipole Interactions, Ion-Dipole Interactions, Ion-Induced Dipole Interactions, Dipole-Induced Dipole Interactions, and Dispersion Forces are the intermolecular forces.
A significant amount of energy will be needed to break bonds as atom sizes grow because of the stronger intermolecular force. Since among all the elements, bromine is the largest in size. Bromine will therefore have the highest melting point.
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A chunk of dry ice, solid co2, disappears after sitting at room temperature for a while. There is no puddle of liquid. What happened?.
A piece of dry ice, which is solid CO2, vanishes after some time at normal temperature. There is no liquid puddle. The CO2 gas solidified.
How does dry ice function and what is it?Carbon dioxide freezes into a substance called dry ice. Carbon dioxide travels directly from a gas to a solid rather than first becoming a liquid and then a solid. As a result, whenever it melts, gas is created as well.
What is the real purpose of dry ice?Typically, dry ice is utilized in industry for tasks like blasting, preserving frozen goods, and transporting drugs. In addition, dry ice is employed in our daily lives for a variety of other things, such as producing special effects for movies and events.
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draw the structure of the tetrahedral intermediate initially formed in the reaction shown. 2ch3ch2nh2
What is Nucleophilic Acyl Substitution?
A reaction known as nucleophilic acyl substitution occurs when a nucleophile forms a new bond with an acyl group's carbonyl carbon while simultaneously breaking the bond between the carbonyl carbon and a leaving group.
In two phases, (1) addition and (2) elimination, a nucleophilic acyl substitution takes place.
A nucleophile attaches to the carbonyl center during the addition step to form a tetrahedral intermediate.
A group that was joined to the carbonyl center of the molecule departs in the second step.
The nucleophilic addition of an amine molecule to one of the two carbonyl sites in the provided cyclic anhydride results in the formation of a tetrahedral intermediate.
The tetrahedral intermediate's structure is depicted below:
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What is the major organic product obtained from the following sequence of reactions? OH TSCI NaOCH, pyridine 2 1. Identify the order of the alcohol (1, 2, 3) 2. Name the reactant. S-2-pentanol 3. Name the product(s). pent-2-ene 4. Draw the product(s) of the reaction on your file to upload.
When pentanol reacts with tscl and pyridine it yields 1-pentene and 2- pentene. The alcohol involved is secondary.
Pentanol (C₅H₁₁OH) reacts with thionyl chloride (TSCA) to form pent-2-chloride (C₅H₉Cl). This reaction is an example of a nucleophilic substitution reaction, in which the hydroxyl group of the alcohol is replaced by a chlorine atom.
The pent-2-chloride then reacts with pyridine and sodium methoxide (NaOCH₃). Pyridine is a strong base, so it acts as a nucleophile and attacks the carbon-chlorine bond of the pent-2-chloride, forming a pent-2-yl cation. The sodium methoxide then acts as a nucleophile, displacing the chlorine atom from the cation to form pent-2-ene. This is an example of an SN2 reaction, in which the nucleophile attacks the carbon atom bearing the leaving group.
Overall, the reaction of pentanol with TSCI and pyridine along with sodium methoxide is a two-step process. The first step involves the substitution of the hydroxyl group with a chlorine atom, and the second step involves the displacement of the chlorine atom with a methoxide ion. Therefore,
1) The alcohol involved is secondary.
2) The reactant is pentanol
3) The product is pent-2-ene
4) In the below-attached image, all the reactions are shown clearly.
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Help me asap, due today
1. The equation is not balanced. The balanced equation is [tex]4NH_3 + 5O_2 --- > 4NO +6 H_2O[/tex]
2. The equation is balanced.
3. The equation is not balanced. The balanced version is [tex]2H_2O --- > 2H_2 + O_2[/tex]
Balancing chemical equationsA balanced chemical equation usually has the same number of atoms of different elements in the reactants and the products, even though the forms of the atoms might have changed.
Consider the first equation: [tex]NH_3 + O_2 --- > NO + H_2O[/tex]
The number of hydrogen atoms is not balanced. Thus, the equation that shows balanced atoms of different elements would be: [tex]4NH_3 + 5O_2 --- > 4NO +6 H_2O[/tex]
Consider the second equation: [tex]N_2 + 3H_2 -- > 2NH_3[/tex]
There are 2 atoms of nitrogen in the reactants and there are also 2 in the product. The number of hydrogen atoms is 6 in the reactants and 6 in the products. Thus, it is a balanced equation.
Consider the third equation: [tex]2H_2O --- > H_2 + O_2[/tex]
There are 4 hydrogen atoms in the reactant and only 2 in the products. The balanced equation would be: [tex]2H_2O --- > 2H_2 + O_2[/tex]
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calculate the theoretical yield of acetylsalicylic acid from 2.01 g of salicylic acid assuming excess acetic anhydride.
The theoretical yield of acetylsalicylic acid from 2.01 g of salicylic acid assuming excess acetic anhydride is 0.002.
A mole is a unit of measurement used in chemistry to count molecules based on their mass. You can determine the initial amounts of oxygen and glucose by counting the moles of each substance.Examine the reaction's balanced equation. You can determine the ratio of molecules required for a reaction by looking at the coefficients in front of each molecule.One of the reactants will typically be consumed before the others in chemical reactions. The limiting reactant is the one that exhausts itself first. The theoretical yield and the duration of the chemical reaction are constrained by this limiting reactant.To study more about balanced equation -
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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?
The nucleophile has to attack from: A nucleophilic attack often occurs when an electron-rich species (the nucleophile) "attacks" an electron-deficient species (the electrophile, usually a carbocation), forming a new bond between the nucleophile and the carbocation.
Nucleophile (Nuc): A reactant that offers a couple of electrons to form a brand-new covalent bond (i.e. a Lewis base). A nucleophile that shares an electron pair with a proton is generally known as a Bronsted-Lowry base or just a base. Hydroxide ion as a nucleophile in an SN2 reaction.
In chemistry, a nucleophile is a chemical species that paperwork bonds by using donating an electron pair. All molecules and ions with a free pair of electrons or at least one pi bond can act as nucleophiles. due to the fact nucleophiles donate electrons, they're Lewis bases.
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for the reaction shown, draw the major organic product and select the correct iupac name for the organic reactant. the starting material is a 4 carbon chain with a double bond between carbons 1 and 2. there is a methyl substituent on carbon 2. the alkene reacts with h c l to give the product.
(C5H11) n-Pentyl is the major product of 4 carbon chain with a double bond between C1 and 2. there is a methyl(CH3) substituent on C 2. the alkene (C5H10) reacts with HCL .
What is the IUPAC name of the given reactant in the statement?The IUPAC name of the given reactant in the statement is CYCLOPENTANE.
Solution:As per the given statement:
The starting is a 4 carbon chain with a double bond between C1 and 2. there is a methyl(CH3) substituent on C 2. the alkene (C5H10) reacts with HCL to give the product
Hence,
C5H10 +HCL → C5H11 +Cl2
hence,(C5H11) n-Pentyl is the major product of C5H10 +HCL → C5H11 +Cl2.
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enough of a monoprotic acid is dissolved in water to produce a 1.55 m solution. the ph of the resulting solution is 2.70 . calculate the ka for the acid.
The ka for the monoprotic acid which produces a 1.55m solution is 5.37 × 10⁻⁴.
An acid that may donate simplest one proton is known as monoprotic acid, while polyprotic acid can donate multiple proton. In addition, a monoprotic base can be most effective to accept one proton, while a polyprotic base can take delivery of more than one proton.
The key difference among diprotic and monoprotic acid is that monoprotic acids are able to donate one hydrogen atom or proton to their aqueous solution, while diprotic acids are able to donate hydrogen atoms or protons to their aqueous solutions.
Calculation
The value of dissociation constant of acid is given as,
Ka = (0.00295)(0.00295)/0.0162)
Ka = 5.37 × 10⁻⁴
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how many milliliters of 0.112 m na2co3 will completely react with 27.2 ml of 0.135 m hno3 according to the reaction
Nitrogen dioxide (NO 2) reacts with water to create nitric acid. 3 NO2 + H 2O 2 HNO 3 + NO is the overall reaction. The nitric oxide that results from the reaction is typically reoxidized by the oxygen in the air to yield more nitrogen dioxide.
Nitrate salts are created when it reacts with hydroxides, metals, and oxides. Strong oxidizing agents like HNO3 are employed. It can be produced by catalytically oxidizing ammonia. It is a typical reagent used in labs and a crucial chemical used in the production of explosives and fertilizers in the industrial sector.
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different steps of the oxidative decarboxylation of pyruvate by the pyruvate dehydrogenase pdh complex are given. place these five steps in the correct order. note that thiamine pyrophosphate, tpp , is sometimes called thiamine diphosphate, tdp . you are currently in a ranking module. turn off browse mode or quick nav, tab to move, space or enter to pick up, tab to move items between bins, arrow keys to change the order of items, space or enter to drop.
The five correct steps on oxidative decarboxylation of pyruvate are:
Pyruvate reacts with TPP and is decarboxylated, forming hydroxyethyl-TPP.The lipoamide arm of E2 moves to the active site of E1, enabling the transfer of the acetyl group to the lipoamide.The acetyl lipoamide arm of E2 moves to the active site of E2, where the acetyl group is transferred to CoA, forming acetyl-CoA and the reduced form of lipoamide.The lipoamide arm move to the active site of E3, where the reduced lipoamide is oxidized by FAD, forming the active lipoamide and FADH2.FADH2 is reoxidized to FAD, reducing NAD+ to NADH.These steps are correct in the process of oxidative decarboxylation of pyruvate, because they describe the complete process of pyruvate decarboxylation, from the initial conversion of pyruvate to hydroxyethyl-TPP, to the transfer of the acetyl group to CoA, to the reoxidation of FADH2. This sequence of steps ensures that the energy from the oxidation of pyruvate is captured and stored as energy-rich molecules, such as NADH and acetyl-CoA.
What does the oxidative decarboxylation process consist of?
Is a type of metabolic reaction in which a carboxylic acid is converted into an aldehyde, alcohol, or ketone by the addition of an oxidizing agent, such as oxygen or a metal compound.
This reaction involves the removal of a carboxyl group (COOH) and the addition of an oxygen atom (O). The resulting product contains either an aldehyde, alcohol, or ketone group, depending on the starting material.
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A naturally occurring sample of an element contains only two isotopes. The first isotope has a mass of 68.9255 amu and a natural abundance of 60.11%. The second isotope has a mass of 70.9247 amu. Use this information to answer the following questions. Calculate the atomic mass of the element, to 4 significant figures. Include the unit, amu, in your answer below. Give the full name for the element that exists as these two isotopes. Explain how you determined the element name in the above question.
The name of the element is Gallium and the symbol is Ga.
Solution:
Abundance of second isotope = (100 - 60.11) = 39.89 %
Atomic mass of element = 68.9255 * (60.11 / 100) + 70.9247 * (39.89 / 100) = 69.72 AMU
The atomic mass of an element is 69.72 AMU which is matched with the atomic mass of gallium.
so,
The name of the element is Gallium and the symbol is Ga.
The atomic mass of an element is the weighted average of the atomic masses of the naturally occurring isotopes of that element. Atomic mass calculations use the abundance ratios of each isotope. Isotopes are members of a family of elements that all have the same number of protons and different numbers of neutrons.
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how calculate ratio product reactants given inital concentration and percent forward backward reaction
The ratio of product to reactants is Equilibrium constant.
What is equilibrium constant?
The equilibrium constant is the ratio of products to reactants at equilibrium. It is denoted by K
Fora given reaction:
Reactants ⇌ Products
When the forward and reverse responses occur at the same pace, their effects cancel out. At this stage, a process is said to be in chemical equilibrium.
For above reaction,
Ratio of product to reactants or equilibrium constant, is given by:
K = [tex]\frac{products}{reactants}[/tex]
Why should the rate of forward and reverse reaction become equal in equilibrium?
If the rate of forward reaction exceeds the rate of backward reaction, reactants are being converted into products. The forward reaction is preferable. The quantity of reactants is decreasing while the quantity of products is increasing. As a result, it is not in equilibrium.
When the rate of backward reaction exceeds the rate of forward reaction, products become reactants. The reverse reaction is preferred. The quantity of reactants is increasing while the quantity of products is decreasing. As a result, it is not in equilibrium.
There should be no change in the quantities of reactants or products at equilibrium, creating the impression that nothing is happening. Forward and backward reflexes must have the same rate to meet this criteria.
The ratio of product to reactants is Equilibrium constant.
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when 0.20 m nh4cl(aq) and 0.20 m naoh(aq) are mixed, the reaction represented by the equation above occurs and a strong smell of ammonia, nh3, is observed. based on this information, which of the following statements is true?
NH4+(aq) and Cl−(aq) are a conjugate acid-base pair.
The above statement is true.
What is a conjugate acid-base pair?
A conjugate acid-base pair consists of two molecules or ions that differ by one proton. The molecule or ion that has lost a proton is the conjugate base, while the molecule or ion that has gained a proton is the conjugate acid. The conjugate acid-base pair shares the same base, but has different numbers of hydrogen atoms.
What is a Chemical reaction?
A chemical reaction is a process in which one or more substances are changed into one or more new substances with different properties. Chemical reactions involve the breaking and forming of chemical bonds, and release or absorb energy in the form of heat, light, or sound.
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how does the number of atoms in a 27.5-gram manganese ring compare to the number in a chromium ring of the same mass?
The number of atoms will be more for chromium ring than for mangnese ring.
A mole is 6.022*10^23 atoms/molecules. The SI unit for the amount of substance is a mole and it is represented by “mol”.
The mass of manganese ring is 27.5 grams.
Molar mass of manganese is 54.9 gram/mol.
n=m/M
n=27.5/54.9
n=0.500 mol
The number of atoms of manganese ring can be calculated as follows:
Number of atoms= 6.022*10^23 * 0.500=3.01*10^23 atoms.
The mass of chromium ring is 27.5 grams.
Molar mass of chromium is 51.9 gram/mol.
n=m/M
n=27.5/51.9
n=0.529 mol
The number of atoms of manganese ring can be calculated as follows:
Number of atoms= 6.022*10^23 * 0.529=3.19*10^23 atoms.
Therefore, the number of atoms will be more for chromium ring than for mangnese ring.
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Chemical reactions occur when molecules or atoms collide in a way that the bonds between atoms break and new bonds form. Breaking the bonds of the reactants requires energy, whereas bond formation releases energy.
True , Energy is released during bond formation, whereas energy is required to break the bonds between the reactants.
What do chemical bonding mean?Chemical bonds maintain the interconnectedness of molecules' atoms.. Positively charged subatomic particles and electrons with negative charge interact electrostatically to form bonds. A liquid forms gas bubbles when it reaches its boiling point, which rise to the surface and then burst into the air.
What are the various forms of bonds in chemistry?Chemical bonds are formed when the atoms in a compound's molecule are brought together and kept together by a powerful combining force. Ionic and covalent bonds are the two different types of chemical bonds.
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combustion analysis aof a hydrocarbon produced 33.01 g of carbon dioxide and 27.10 g of water. determine the empiracal formula and write a balanced chemical equation foer the combustion of this hydrocarbon
The empirical formula is CH₄ and write a balanced chemical equation for the combustion of this hydrocarbon is :
CH₄ + 2O₂ -----> CO₂ + 2H₂O
given that :
mass of carbon dioxide = 33.01 g
mass of water = 27.10 g
The combustion reaction is given as :
CnHn + O₂ -----> CO₂ + H₂O
No. of moles of CO₂ = mass / molar mass
= 33.01 / 44.01
= 0.750 mol
number of moles of C = 0.750 mol
no. of moles of H₂O = mass / molar mass
= 27.10 / 18
= 1.50 mol
number of moles of H = 2 × 1.50
= 3
dividing the moles by the lowest one
C = 0.750 / 0.750 = 1
H = 3 / 0.7500 = 4
Thus, the empirical formula for the given compound = CH₄.
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tell me what you know about the intermolecular forces in water. tell us what you know about the intermolecular forces in ethanol (ch3ch2oh). how does the strength of the imfs in water compare to the strength of the imfs in ethanol? enter response here...
Kinds of intermolecular forces are present in a mixture of ethanol (CH3CH2OH) and water are dispersion intermolecular forces
Ethanol or ethyl alcohol is a colorless, volatile, and flammable liquid that soluble in water. Its chemical formula is C2H6O or C2H5OH or CH3CH2OH.
Intermolecular forces that mediate interaction between molecules, including attraction forces or repulsion attraction that act between molecules and other types of neighboring particles such as atoms or ions. There are three major types of intermolecular forces: London dispersion force, dipole-dipole interaction, and ion-dipole interaction
London dispersion forces is the force that hold molecules together in the liquid, solid and solution phases are quite weak. London dispersion force is the weakest of the intermolecular forces. It is the force between two nonpolar molecules
Dipole -dipole interactions between two polar molecules occurred when the partial charges formed within one molecule attracted to an opposite partial charge in a nearby molecule.
The ion-dipole interaction is occurred when an ion encounters a polar molecule.
Hydrogen Bonding is the attraction between two atoms that already participate in other chemical bonds.
Therefore, CH3CH2OH have H-bond intermolecular forces and dipole intermolecular forces and dispersion intermolecular forces. There's no ionic interaction because we don't have metal attached to a nonmetal. For the mixture of ethanol (CH3CH2OH ) and water, it can very easily become a homogeneous mixture because the two liquids are miscible and soluble in all proportions.
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when 65.0 g of ch4 reacts with excess o2, the actual yield of co2 is 92 g. what is the percent yield?
When 65.0g of is burned with enough oxygen, theoretical calculations are amplified by 100%. Divide the reaction's actual yield by its potential value to get the percent yield. The theoretical yield is equal to 100 times the actual yield.
What does a yield of 75% mean?This is the reaction's theoretical yield, or what you would get if it yield 100%. In your situation, it is known that the reaction will generate a percentage of 75%. This basically means that you only receive 75 moles of carbon dioxide for every 100 moles that the reaction may theoretically yield.
How is the yield percentage determined?Improvements to the % yield for chemical production need a lot of time and money. One reaction with a low percent yield can easily result in a significant waste of reactants and excessive expense when complex compounds are synthesized through a number of distinct reactions. The formula percent yield = actual yield/theoretical yield x 100 is used to calculate yield percentage.
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All matter in motion has a wavelength. Why don’t we feel the effects of our own wavelengths? Answer in one complete sentence.
We have a large mass thus our associated wavelength is small for humans.
What is the DeBroglie Wavelength?We know that the wavelength has to do with the distance that is covered by a wave. This would normally refers to the horizontal distance. According to the wave particle duality theory that was put forward by the man Louis DeBroglie, he said that when matter is in motion, it must have an associated wavelength.
We know from the theory that;
λ = h/p
λ = wavelength of the object
h = Plank's constant
p = momentum of the objects.
We have to note that the momentum is the product of the mass and the velocity of the object.
We now know that as the mass of the object increases, the velocity becomes infinitesimal and may not be felt.
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a 433 l tank holds helium gas at -48 °c with a pressure of 1.24 atm. how many moles of gas are in the tank?
Number of moles of gas are in the tank is 0.287 mole.
Pressure is the force implemented perpendicular to the floor of an object in step with unit location over which that force is shipped. Gauge strain is the strain relative to the ambient strain. diverse units are used to specific strain.
Strain is described as force implemented consistent with unit area. Mathematically it's far given by, P=FA. wherein F is the force acting perpendicular to the floor vicinity A. the usual unit of strain is the pascal (Pa), equal to at least one newton in keeping with meter squared (N/m 2 ).
Calculation:-
volume = 433 L
Pressure = 1.24 atm
T = -48 °c
= 273 - 48 K
= 225 K
PV = nRT
n = PV/RT
= 1.24 × 433 / 8.314 × 225 K
= 0.287 mole
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Are the groups of electrons around carbon atom b in propene bonding or nonbonding?.
the groups of electrons around carbon atom b in propene is bonding.
They are not nonbinding because bond formation involves all four valence e. They are bonding because they have all formed a bond. Because this C is sp2 hybridised, the electron geometry of the carbon atom B in propene is trigonal planar. Because propene's overall geometry is trigonal planar, the C-C-C bond angle is 120°. Nonbonding electrons are assigned to the atom they are located on. Non-bonding electron pairs are those on an individual atom that are not shared with another atom.Bonding electrons are distributed equally among the bonded atoms. Bonding electron pairs are electrons that are shared by the central atom and any atom to which it is bonded.
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If the column of water in the water barometer rose to a height of 34 feet, what would the atmospheric pressure be in mm hg?.
The atmospheric pressure of water in a water column which rises to a height of 34 feet in barometer is
What is atmospheric pressure and how to calculate it?The pressure in the Earth's atmosphere is referred to as atmospheric pressure, sometimes known as barometric pressure. It is defined as force applied by an atmospheric column per unit of area.
To calculate the atmospheric pressure for the given problem, we must convert the height of the water column to mmHg from the available information in order to establish the atmospheric pressure at which the water barometer increased.
Our understanding of the standard rate conversion's dimensions leads us to believe that-
1 feet = 12 inches
1 inch = 25.4 mm
1 mmHg = 13.6 mm of water
Therefore, for 34 feet of height in barometer, we can calculate as-
[tex]34 feet[/tex] × [tex]\frac{12 inch of water}{1 feet water}[/tex] × [tex]\frac{25.4 mm of water}{1 inch of water}[/tex] × [tex]\frac{1 mmHg}{13.6 mm of water}[/tex]
= 762 mmHg
Thus, the atmospheric pressure of the water calculated is 762 mmHg.
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Nuclear decay occurs according to first-order kinetics. How long will it take for a sample of radon-218 to decay from 99 grams to 0. 50 grams? the half-life of radon-218 is 35 milliseconds.
In 2.6*10² ms, a sample of radon-218 will deteriorate from 99 grams to 0.50 grams. The half-life of radon-218 is 35 milliseconds.
How crucial is nuclear power? What is a good nuclear example?The only significant, carbon-free energy resource that the nation can extensively expand to produce significant amounts of power is nuclear energy. When fossil fuels are burned to produce the same number of electricity, nuclear power plants avoid producing a sizable amount of emissions. One of the best instances of nuclear fusion seems to be the sun. Helium is created when hydrogen nuclei combine inside the sun, producing thermal energy which warms the Earth..
Briefing:t = 2.303/R log A₀/A
Hence, R = 0.693/t/2
t = 2.303/0.693*35 log 99/0.5
t = 267ms
= 2.6*10² ms
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at what temperature in k will 0.760 moles of oxygen gas occupy 8.00 l and exert 2.60 atm of pressure?
At 333K temperature 0.760 moles of oxygen gas occupy 8.00 L and exert 2.60 atm of pressure.
What is ideal gas law?
The relationship between a gas's pressure P, volume V, and temperature T in the range of low pressures and high temperatures, when the gas's molecules move virtually independently of one another, is known as the ideal gas law, also known as the perfect gas law.
Given:
Number of mole (n) = 0.760 mole
Volume of oxygen (V) = 8.00 L
Pressure (P) = 2.60 atm
Temperature (T) =.?
We know, Gas constant (R) = 0.0821 atm.L/Kmol
Using the ideal gas equation we get:
PV = nRT
2.6 x 8 = 0.76 x 0.0821 x T
So,
T = (2.6 x 8) /(0.76 x 0.0821 )
T = 333 K.
Hence, the temperature is 333 K.
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The temperature at 9 p.m. was -4 degrees Fahrenheit, which is one-third of the temperature at midnight. What was the temperature at midnight? Write an equation that could represent this situation.
Temperature at midnight would be -12 degrees Fahrenheit and is determined using the equation that represents this situation i.e., T/3 = -4.
In mathematics, an equation is a representation of a formula or statement that illustrated an equality relationship of two expressions. The expressions are connected with an equals sign. Solving an equation containing variables involves calculating values of the variables that make the equality true. The variables for which the equation has to be solved are also called unknowns, and the values of the unknowns that satisfy the equality are called solutions of the equation.
Based on the information provided, as the temperature at 9am is -4 and it is the 1/3 of the temperature at midnight T, the equation would be:
1/3* Midnight temperature = 9am temperature
1/3*T = -4 or T/3 = -4
Solving the equation,
T = 3*-4 = -12.
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A flexible plastic bag at standard pressure and temperature is heated to 350. K. If the final volume is 2.75 L, calculate
the initial volume
Answer:
2.15 L
Explanation:
We can use the combined gas law to answer this:
P1V1/T1 = P2V2/T2
where P, V, and T are the Pressure, Volume, and Temperature (in Kelvin) for the initial (1) and final (2) states. We may assume the pressure remains the same between both states (1 atmosphere. or standard pressure). Ci=onvert the Celcius temperatures into Kelvin by add 273.15 to the C value.
We want the original volume, V1. Rearrange the equation to solve for V1:
V1 = V2(P2/P1)(T1/T2)
Note how the pressure and temperature variables are formatted: as ratios. This allows us to more easily visualize how the changes in both will impact the value of V1. A rise in temperature between T1 and T2 would mean that the ratio (T1/T2) would be less than 1, so the initial volume, V1, would be smaller than the final volume, V2. The raio of the pressures P2/P1 simply reduces to 1, since they are the same. So even before we get our a calculator, we can predict that V1 will be smaller than V2.
Enter the data: V1 = (2.75L)*(1)*(273.15K/350K)
The pressure and temperature units cancel, leaving only voulume (Liters).
V1 = 2.15L
This is less than 2.75L, which is what we already expected. The initial volume is 2.15 L.
a sample of nitrogen occupies 5.50 liters under a pressure of 900 torr at 25oc. at what temperature will it occupy 15.0 liters at the same pressure?
The temperature, at which it occupies 15.0 litres at the same pressure is, 269°C.
What is Temperature?
A temperature is a unit used to represent hotness or coolness on any of a number of scales, including Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
What is Pressure?
The definition of pressure is "force applied per unit area." It can be calculated mathematically using P=FA, where F is the force acting perpendicular to surface area A. The pascal (Pa), or one newton per square meter (N/m²), is the common unit of pressure.
Calculations:
At the same pressure,
volume is directly proportional to temperature.
i.e., V ∝ T
⇒V₁/V₂ = T₁/T₂
here, V₁ = 5.5 litres , T₁ = 25°C = 298K
V₂ = 10 litres, T₂ = ?
now, 5.5/10 = 298/T₂
⇒T₂ = 298 × 10/5.5 ≈ 542 K
Temperature in degree Celsius = 542 - 273 = 269°C
Hence, the temperature, at which it occupies 15.0 litres at the same pressure is, 269°C.
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the empirical formula of certain hydrocarbon is ch2. when 0.125 moles of this hydrocarbon is completely burned with excess oxygen, it is observed that 8.4 literls of co2 gas are produced at stp. what is the molecular formula of the unknown hydrocarbon
C₃H₆ is the molecular formula of the compound.
It is given that the empirical formula for a certain compound is CH₂. In addition to that, the moles of the hydrocarbon is 0.125 moles and combustion gave 8.4 L of CO₂ in STP. To find the molecular formula for the unknown compound, first, we need to balance the reaction, of the combustion
3CH₂ + 3O₂ ------> 2CO₂+ 2H₂O
The number of moles of CO₂ is given as follows
= 8.4/22.4
= 0.375 moles of CO₂
The next step is to convert the moles of CO₂ to CH₂ using the ratio in the balanced equation. By doing so we get,
0.375 moles of CO₂/1 x (2moles of CH₂/2moles of CO₂)
= 0.375 moles of CH₂.
The molecular formula of any compound a multiple of the empirical formula. By dividing the empirical moles by the molecular moles we get, the molecular formula of the compound.
= 0.375/0.125
= 3
By multiplying this value with the empirical formula we get C₃H₆. This is the molecular formula of the given compound
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compound a has a molecular formula of c5h11br. when compound a is treated with bromine in the presence of uv light, the major product is 2,2-dibromopentane
The compound (A) is 2-bromo-pentane. See attached picture for the chemical diagram.
2-bromo-pentane (A) reacts with bromine (Br₂) under UV light to form 2,2-dibromopentane and HBr. Also When 2-bromo-pentane (A) reacts with NaSH to from pentane-2-thiol, which have an asymmetric carbon, and NaBr.
Sufficient images are given below ;
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What are the units remaining after the conversions below?
[need help asap please]