A. The formula and the name of the oxide is VO, Vanadium(II) oxide
B. The formula and the name of the oxide is V₂O₃, Vanadium(III) oxide
C The formula and the name of the oxide is VO₂, Vanadium(IV) oxide
D. The formula and the name of the oxide is V₂O₅, Vanadium(V) oxide
How to determine the formula and the nameThe formula and the name of the various oxide can be obtained as follow:
A. Formula and name for oxide with 76% vanadium
V = 76%O = 100 - 76 = 24%Empirical formula =?Divide by their molar mass
V = 76 / 50.9 = 1.49
O = 24 / 16 = 1.5
Divide by the smallest
V = 1.49 / 1.49 = 1
O = 1.5 / 1.49 = 1
Thus, the empirical formula of the compound is VO and the name is Vanadium(II) oxide
B. Formula and name for oxide with 68% vanadium
V = 68%O = 100 - 68 = 32%Empirical formula =?Divide by their molar mass
V = 68 / 50.9 = 1.34
O = 32 / 16 = 2
Divide by the smallest
V = 1.34 / 1.34 = 1
O = 2 / 1.34 = 1.5
Multiply by 2 to express in whole number
V = 1 × 2 = 2
O = 1.5 × 2 = 3
Thus, the empirical formula of the compound is V₂O₃ and the name is Vanadium(III) oxide
C. Formula and name for oxide with 61% vanadium
V = 61%O = 100 - 61 = 39%Empirical formula =?Divide by their molar mass
V = 61 / 50.9 = 1.2
O = 39 / 16 = 2.4375
Divide by the smallest
V = 1.2 / 1.2 = 1
O = 2.4375 / 1.2 = 2
Thus, the empirical formula of the compound is VO₂ and the name is Vanadium(IV) oxide
D. Formula and name for oxide with 56% vanadium
V = 56%O = 100 - 56 = 44%Empirical formula =?Divide by their molar mass
V = 56 / 50.9 = 1.1
O = 44 / 16 = 2.75
Divide by the smallest
V = 1.1 / 1.1 = 1
O = 2.75 / 1.1 = 2.5
Multiply by 2 to express in whole number
V = 1 × 2 = 2
O = 2.5 × 2 = 5
Thus, the empirical formula of the compound is V₂O₅ and the name is Vanadium(V) oxide
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A chemical reaction with 28g of reactants is completed in a closed system (all of the reactants are used up and none of the products escape). What is the mass of the products?
From the law of the conservation of mass, we can see that the mass of the products in the system is 28 g.
What is the Law of conservation of mass?The law of conservation of mass states that the mass of the system before the reaction ought to be the same as the mass of the system after reaction. Seeing that we have 28g of reactants is completed in a closed system (all of the reactants are used up and none of the products escape), we now now need to determine the mass of the products.
If we consider the law of conservation of mass, then we must have to agree that the mass of the product would be 28 g.
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Write the molecular and empirical formulas of the following compound:
O-H
|
O-P-0-H
O-H
Answer:
the answer base on my test is H3O4P1
Calculate the number of moles that are present in 100g of SO₂. Show your work with units.
The number of moles SO₂ that are present in 100g of SO₂ 1.56 moles.
What is the formula for calculating the moles of a substance given the mass of the substance?The moles of a substance is related to the mass of the substance and the molar mass as follows:
mole = mass / molar massthe molar mass of a substance is the mass of 1 mole of the substance.
Molar mass of SO₂ = 32 + 16 * 2
Molar mass of SO₂ = 64
mass of SO₂ in the sample = 100 g
moles of SO₂ = 100 / 64
moles of SO₂ = 1.56 moles
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what is meant by the term bumping? select one: agitating a liquid with a stir bar or stirring rod one liquid coming in contact with another suddenly increasing the temperature on a liquid sudden and uncontrolled boiling of liquid
Bumping is the sudden and uncontrolled boiling of liquid.
Bumping is a word used in chemistry to describe the situation where homogeneous liquids boiled in a test tube or other container will superheat and, upon nucleation, rapid boiling will expel the liquid from the container. This happens when liquids are heated up beyond their boiling points and it causes them to burst out of their containers.
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A glass container was initially charged with 1.90 moles of a gas sample at 4.00 atm and 21.7 °C. Some of the gas was released as the temperature was increased to 29.1 °C, so the final pressure in the container was reduced to 1.05 atm. How many moles of the gas sample are present at the end?
The no. of moles of the gas sample are present at the end is 0.486 moles
The ideal gas law is :
PV = nRT
here,
P is pressure = 4.00 atm
T is temperature = 21.7 °C = 294.7 K
n is moles = 1.90 moles
R is gas constant
V = n RT / P
= (1.90 × 0.082 × 294.7) / 4
= 11.47 L
Now when temperature is 302.1 K , pressure is 1.05 atm and volume is 11.47 L then the moles will be :
PV = n RT
n = PV / RT
= ( 1.05 × 11.47 ) /( 0.082 × 302.1 )
= 12.04 / 24.77
= 0.486 moles
Thus , A glass container was initially charged with 1.90 moles of a gas sample at 4.00 atm and 21.7 °C. some of the gas was released as the temperature was increased to 29.1 °C, so the final pressure in the container was reduced to 1.05 atm . the no. of moles of the gas sample are present at the end is 0.486 moles
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if you gently shake a separatory funnel containing a carboxylic acid with chloroform and aq nahco3, the organic acid will be found where? (multiple answers possible)
If you gently shake a separatory funnel containing a carboxylic acid with chloroform and aq NaHCO3, the organic acid will be found in the top layer and the aqueous layer.
Here's the complete question:
If you gently shake a separatory funnel containing a carboxylic acid with chloroform and aq NaHCO3, the organic acid will be found where? (Multiple answers possible)
a) The top layer b) The bottom layer. c) The organic layer. d)The aqueous layer. e) As an insoluble solid.
Generally, Acid-base extractions are used in extracting Carboxylic acids from the organic layer to the aqueous and top layer by shaking them with a basic solution.
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When attractive forces between molecules are strong in a liquid, the liquid can be described as...
a solid
b.
fluid
C.
viscous
d
definite in shape
When attractive forces between molecules are strong in a liquid, the liquid can be described as solid.
How are attraction forces in solid, liquid, and gas?A solid's internal kinetic energy produces a force that is weaker than the attraction forces between its molecules. The molecules in a solid are kept in close proximity to one another by attraction forces as the attractive forces between molecules are strong.In a liquid, there is more kinetic energy than there is in a solid. In a solid, the stiff attraction between molecules can be broken by kinetic energy. The molecular attraction between them is still strong enough to keep the liquid's molecular structure intact.In comparison to kinetic energy in molecules, kinetic energy in a gas is substantially strong. In a gas, the attraction between the molecules is significantly weaker than the kinetic energy. In this situation, there is no longer any molecular attraction.
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the mass of fe(s) produced when 1 faraday is used to reduce a solution of feso4 is 1.5 times the mass of fe(s) produced when 1 faraday is used to reduce a solution of fecl3.
Fe2+ requires 2 Faraday / mol Fe (s) or 1 Faraday → 1/ 2 mol Fe(s) Fe3+ require 3 Faraday / mol Fe (s) or 1 Faraday → 1/3 mol Fe (s) for equal numbers of Faraday (1/2 : 1/3 as 1.5 : 1) (Or inverse relationship is clear) no 2nd point unless flow of e¯ to mass (moles) is clear and logically correct
Is faraday unit of charge?The faraday is a dimensionless measure of the amount of electric charge, or roughly 6.02 × 10²³ electric charge carriers. This exists even referred to as Avogadro's constant and is equivalent to one mole. The coulomb (C) is the most popular unit for measuring the amount of electric charge in the International System of Units (SI).
Fe2+ requires 2 Faraday / mol Fe (s) or 1 Faraday → 1/ 2 mol Fe(s) Fe3+ require 3 Faraday / mol Fe (s) or 1 Faraday → 1/3 mol Fe (s) for equal numbers of Faraday (1/2 : 1/3 as 1.5 : 1) (Or inverse relationship is clear) no 2nd point unless flow of e¯ to mass (moles) is clear and logically correct
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tertiary and secondary alcohols react with hx by forming a carbication intermediate. methyl and primary alcohols do not form these intermediates; they form alkyloxonium ions that react with the nucleophilic x–. the halide ion bonds to the primary or methyl carbon by eliminating a(n) molecule.
lysozyme, an enzyme found in human saliva, tears, and other secretions, catalyzes the hydrolysis of the beta-1,4-glycosidic linkages and peptidoglycan. This enzyme degrades the bacterial cell wall but it is suitable for human health by preventing bacterial infection.
What is hydrolysis?
The cleavage of biomolecules known as biological hydrolysis occurs when a water molecule is consumed in order to cause the division of a bigger molecule into its component parts. Saccharification is the process of hydrolyzing a carbohydrate into its individual sugar molecules, as occurs when sucrose is broken down into glucose and fructose.
The beta one for, say, acidic connections, an urgent analogy that will demolish the bacterial cell wall. By destroying their peptidoglycan, it breaks down the bacterial cell wall. In addition, since we lack peptidoglycan in our bodies, an enzyme that kills bacteria won't have the same impact on human cells. This is excellent for human health since it can help stop bacterial infections. Because it will presumably destroy microorganisms, we detect it in human secretions that come into contact with the environment, such as tears and saliva.
Hence . lysozyme degrades the bacterial cell wall but it is suitable for human health by preventing bacterial infection.
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The hydrolysis of the beta-1,4-glycosidic bonds and peptidoglycan is catalyzed by the enzyme lysozyme, which is present in human saliva, tears, and other secretions. This enzyme breaks down the bacterial cell wall, but because it guards against bacterial infection, it is safe for human health.
Describing hydrolysis.
When a water molecule is consumed to split a larger molecule into its constituent parts, the process of cleaving biomolecules is known as biological hydrolysis. Hydrolyzing a carbohydrate into its constituent sugar molecules, as happens when sucrose is broken down into glucose and fructose, is the process known as saccharification.
The beta one, for example, would be for acidic connections, a critical comparison that would destroy the bacterial cell wall. It disintegrates the bacterial cell wall by dissolving their peptidoglycan. Additionally, an enzyme that kills bacteria won't have the same effect on human cells since we lack peptidoglycan in our body. Since it can aid in preventing bacterial infections, this is fantastic for human health. We find it in human fluids that come into contact with the environment, including tears and saliva, because it will likely kill bacteria.
Hence . Lysozyme breaks down bacterial cell walls, yet because it guards against bacterial infection, it's safe for human health.
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the electron configuration for copper is 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 1 3 d 10 1s22s22p63s23p64s13d10. how many inner core electrons does copper contain?
Copper [Cu] has 28 inner core electrons
Copper is a group 11 element with atomic number 29. It has one valence electron
Valence electron is the electron in the outermost shell and it's the number of electron an atom lose or gain to become a noble gas
Cu has four electron shells with 2,8,18 and 1 electrons in each shell respectively
The outermost shell containing just one electron .
Apart from this shell, the rest of the shells contain 28 electrons and these are regarded as the inner core electrons
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16. Give examples of at least three questions that we can use science to help answer.
Answer:
1.) Why is the sky blue?
2.) How far away from earth is the moon?
3.) How many different kinds of bacteria are on the main door handle at school?
Explanation:
Questions based on observations or on data from experiments are the ones that science can most likely help with.
a person enters a kitchen and smells lemons. the next time the person smells lemons, the scent and name of item producing the scent is remembered. what steps occur to form this memory? place the event in order they occur in the nose and the brain.
Long-term memory formation is a highly dynamic process involving multiple temporal and functional stages including encoding consolidation retrieval storage and reconsolidation.
Scientists believe that smell and memory are so closely linked because the anatomy of the brain allows smell signals to travel to the limbic system so quickly. Experts say that memories associated with smells tend to be older and less thought-provoking, which means the memories are very vivid.
Smells are processed by the olfactory bulb a structure at the front of the brain that sends information to other areas of the body's central command center for further processing. Scents reach directly into the limbic system, which includes the amygdala and hippocampus regions associated with emotion and memory.
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A compound of bromine and fluorine is used to make uf6, which is an important chemical in processing and reprocessing of nuclear fuel. The compound contains 58. 37 mass percent bromine. Determine its empirical formula.
The empirical formula for the given compound is BrF₃.
It is given that,
% of Br = 58.37
then % of F = 100 - 58.37 = 41.63%
Let the mass of the compound be 100 g. So, the percentages given are taken as mass.
Mass of Br = 58.37 g
Mass of F = 41.63 g
To formulate the empirical formula,
No. of moles of Br = 58.37/79.90 = 0.73 moles
No. of moles of F = 41.63/19 = 2.19 moles.
For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.73 moles.
For Bromine = 0.73/0.73 = 1
For Fluorine = 2.19/0.73 = 3
Now, taking the mole ratio as their subscripts.
The ratio of Br : F = 1 : 3
Hence, the empirical formula for the given compound is BrF₃.
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a mixture contains n a h c o 3 together with unreactive components. a 1.62 g sample of the mixture reacts with h a to produce 0.561 g of c o 2 . the molar mass of n a h c o 3 is 84.01 g/mol and the molar mass of c o 2 is 44.01 g/mol . what is the percent by mass of n a h c o 3 in the original mixture?
The percent by mass of sodium bicarbonate in the sample mixture is 67%.
Sodium bicarbonate reacts with a monoprotic acid HA in the following manner:
[tex]NaHCO_{3} + HCl[/tex] → [tex]NaCl + H_{2}O+CO_{2}[/tex]
This means that 1 mole of sodium bicarbonate produces 1 mole of carbon dioxide. We can use this to set up a proportion:
84.01 g of sodium bicarbonate : 44.01 g of carbon dioxide = X : 0.561 g of carbon dioxde
X is equal to the mass of sodium bicarbonate in the sample.
X = 84.01 g * 0.561 g / 44.01 g = 1.08 g of sodium bicarbonate
The percent by mass is calculated using the following equation:
%w = 100% * mass of sodium bicarbonate / mass of mixture = 100% * 1.08 g / 1.62 g = 67%
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What type of data would be helpful to collect in the Antacid Film Canister Lab?
All of these choices
The temperature of the reactants
The concentration of the reactants
The time it takes for the top to pop on the film canister
The data that we could be able to collect in the antacid cannister lab is the time it takes for the top to pop on the film canister.
What is the Antacid Film Canister Lab?Just like every other lab that we could carry out in the pure sciences, the Antacid Film Canister Lab has the aim of trying to obtain the pressure that would be require to blow off the rocket.
In this case, the antacid is gradually dissolved in such a way that the carbon dioxide would be produced and the pressure would keep building up inside the cannister somewhat gradually.
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in the standardization part, how would the calculated naoh concentration be affected if some of the acid solution were splashed onto the flask walls and was not rinsed down before reaching the end point? would it be higher than the actual concentration, lower, or would there be no effect? explain.
The outcome won't be exact. Any liquid, including basic and acidic liquids, could contaminate it.
Why do we standardize the NaOH solution ?To determine the precise concentration of a solution whose concentration is unknown, a NaOH solution must be standardized. To obtain an equivalence point and determine the unknown concentration, standardization involves titrating a known volume of NaOH with an acid in a flask.
Purpose of standardizing the NaOH solution :To determine the precise concentration, you will standardize a NaOH solution in this experiment. You will use standardized NaOH to calculate the concentrations of HCl and HC2H3O2 solutions in subsequent experiments. You'll discover various indicators for endpoint detection.
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How many molecules are in 25 grams of C6H1206?
What is the mass of 5.32 x 10^25 atoms of sodium?
Answer:
2031 g or 2.03 kg
Explanation:
1 mole of Na = 22.990 g = 6.022 x 10^23 atoms
so the mass of 5.32 x 10^25 atoms of Na equals
(22.990)(5.32 x 10^25)/(6.022 x 10^23)
= 2030.99966788 g = 2031 g or 2.03 kg
what does the atomic theory describe
pls help 100 PTS worksheet attached
Answer:
It wont let me download the pdf
Explanation:
Answer:
I can’t download it
Explanation:
Describe the parts of an atom including location, charge, mass and what each part determines about the atom.
Answer:
1. Protons: located in the nucleus, positive charge, mass is 1 amu
2. Neutron: located in nucleus, neutral charge, mass is 1 amu
3. Electron: located in the 3 dimensional space around the nucleus, negative charge, nearly massless when compared to protons and neutrons
Explanation:
I’ve has density of 0.92g/cm what will ice do in water
The unknown liquid must have a density that is lower than that of water since ice will only float in liquids that are less dense than water.
Briefing:For your information, ice has a density of 0.92 g/cm³ but water has a density of 1 g/cm³. Only liquids less dense than 0.92 g/cm³ will cause ice to sink. The unknown liquid must have a density that is lower than that of water since ice will only float in liquids that are less dense than water.
Why is ice low density?Other liquids have denser solid phases due to the tightly packed arrangement of molecules at lower temperatures. Although the water ice's hydrogen bonds are strong, their orientation causes molecules to push apart, which lowers density.
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In the first reaction of the citric acid cycle, oxaloacetate, which contains blank______ carbons, is combined with acetyl-coa, which contains blank______ carbons in its acetyl group, to produce citric acid, which contains blank______ carbons.
In the first reaction of the citric acid cycle, oxaloacetate, which contains 4 carbons, is combined with acetyl-coa, which contains 2 carbons in its acetyl group, to produce citric acid, which contains 6 carbons.
What is carbon?
Chemical element carbon has the atomic number six and the letter C assigned to it. It has a monovalent atom, which means that four of its electrons may be used to create covalent chemical connections. It is nonmetallic. The element table's group 14 includes it. The crust of the Earth contains barely 0.025 percent carbon.
Therefore,
In the first reaction of the citric acid cycle, oxaloacetate, which contains 4 carbons, is combined with acetyl-coa, which contains 2 carbons in its acetyl group, to produce citric acid, which contains 6 carbons.
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using nad and nadh (no structures needed) write out the reaction for the oxidation of methanol (ch3-oh) to formaldehyde, in which nad is the oxidizing agent. we won’t encounter this reaction, but it is a lot like ones we will.
Using NAD and NADH reaction for the oxidation of methanol CH₃OH to formaldehyde, in which NAD is the oxidizing agent and then alcohol oxidase was crystallized after purification by ammonium sulfate precipitation
Oxidation means a process in which a chemical substance changes because of the addition of oxygen
Methanol was oxidized to formaldehyde by an alcohol oxidase and the reaction are
CH₃OH+O₂ → HCOH + H₂O₂
And the cofactor found in two form of cell and NAD is an oxidizing agent and it accept the electron of other molecule and reduced and this reaction is also with H⁺ form NADH which can be used as the reducing agent to donate electron and this reaction gives alcohol oxidase was crystallized after purification by ammonium sulfate precipitation
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c. A pure substance has "one set of universal properties". What does this mean?
A pure substance has "one set of universal properties". This means they have some of the universal properties in common.
The definition of universal propertyA characteristic that describes some structures up to an isomorphism is known as a universal property in mathematics, more specifically in category theory.
As a result, independent of the construction technique used, some objects can be described using universal properties. For example, one can define polynomial rings as derived from the field of their coefficients, rational numbers as derived from integers, real numbers as derived from integers, and rational numbers as derived from real numbers.
All of these definitions can be made in terms of universal properties. In particular, the concept of universal property offers a simple demonstration of the equality of any real number structures, requiring only that they satisfy the same universal property.
What is the universal property of all substances?Diamagnetism is a feature that all substances share.
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to increase the water solubility of resorcinol or salicylic acid, 3m naoh is used to dissolve them. why do they dissolve better in naoh than in water?
To increase the water solubility of resorcinol or salicylic acid, 3m naoh is used to dissolve them. the reason why they dissolve better in NAOH than in water is because resorcinol as well as salicylic acid have some measures of acidic hydrogens and so they can be ionized inside of NaOH.
How does salicylic acid dissolve in water?
Salicylic acid must be transformed into salicylate because it is insufficiently soluble in water at room temperature to produce the composition you want.
Note that Salicylic acid can be used to accomplish this by reacting with sodium bicarbonate (baking soda) in water; the salicylic acid will dissolve during the reaction.
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Need this quick to correct my chem quiz, will give brainliest!
ROUND the answer for each problem to the CORRECT number of significant figures.
A: (7.31 × 10^4) + (3.23 × 10^3)
B: (8.54 × 10^-3) - (3.41 × 10^-4)
C: 4.35 dm × 2.34 dm × 7.35 dm
D: 4.78 cm + 3.218 cm + 5.82 cm
E: 38,736 km ÷ 4,784 km
Answer:
A I did this and got an 100 eazy
What is the concentration of nitrate ion in a solution made by mixing 100 ml of a 0.200 m hno3 solution with 200 ml of a 0.100 m solution of mg(no3)2?
The total concentration (or molarity) of nitrate ions in the mixed solution will be 2 M (2 mol/L).
The nitrate ion in the final solution will originate from both nitric acid and magnesium nitrate. To find the final molarity, it is easiest to find the number of moles originating from nitric acid, then do the same for magnesium nitrate, add those moles together, and divide them by the total volume.
Because 1 mol of nitric acid generates 1 mol of nitrate ions, the amount of nitrate ions will be equal to the amount of nitric acid.
c = n/V ⇒ n = V*c = 0.100 L * 0.200 M = 0.02 mol
On the other hand, 1 mol of magnesium nitrate generates 2 moles of nitrate ions, so the amount of nitrate ions will be double the amount of magnesium nitrate.
n = V*c = 0.200 L * 0.100 M = 0.02 mol of magnesium nitrate ⇒ 0.04 mol of nitrate ions
total amount = 0.02 mol + 0.04 mol = 0.06 mol
total volume = 0.100 L + 0.02 L = 0.03 L
c = n/V = 0.06 mol / 0.03 L = 2 M
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At a fixed temperature and pressure, the volume occupied by a gas is _____ proportional to the number of moles of gas present. For ideal gases under these conditions, equal _____ of gas contain equal numbers of particles or moles.
directly, volumes
At a fixed temperature and pressure, the volume occupied by a gas is directly proportional to the number of moles of gas present. For ideal gases under these conditions, equal volumes of gas contain equal numbers of particles or moles.
The physical behavior of a sample of gas can be described completely by the four variables, pressure (P), volume (V), temperature (T) and quantity (moles). These variables are interdependent. Any one of them can be determined by knowing the other three.
The volume occupied by a mole of gas at STP ( same temperature and pressure) is called the standard molar volume and is very nearly a constant for gases.
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if, at a given temperature, the equilibrium constant for the reaction h2(g) cl2(g) 2hcl(g) is kp, then the equilibrium constant for the reaction hcl(g) h2(g) cl2 (g) can be represented as:
if, at a given temperature, the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp, then the equilibrium constant for the reaction : 2HCl ----> H₂ + Cl₂ is 1 / Kp.
the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp,
when we reverse the equation the equilibrium constant becomes reciprocal of original reaction . so the reaction is given as:
2HCl ----> H₂ + Cl₂
this is the reverse reaction of the original reaction ,so the equilibrium constant becomes the reciprocal of the original reaction.
so, the equilibrium constant K'p = 1/ Kp
Thus, if, at a given temperature, the equilibrium constant for the reaction
H₂ + Cl₂ ----> 2HCl is Kp, then the equilibrium constant for the reaction : 2HCl ----> H₂ + Cl₂ is 1 / Kp.
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