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Chemistry Part-I

States of Matter

Pressure of 1 g of an ideal gas A at 27 ^{}C is found to be 2

Chemistry Part-I

Class 11

NCERT

Chapter 1: Some Basic Concepts of Chemistry

44 questions

Chapter 2: Structure of Atom

85 questions

Chapter 3: Classification of Elements and Periodicity in Properties

50 questions

Chapter 4: Chemical Bonding and Molecular Structure

44 questions

Chapter 5: States of Matter

28 questions

0^{\circ} C

the density of certain oxide of a gas at

2

bar is same as that of dinitrogen at

5

bar. What is the molecular mass of the oxide?

Pressure of 1 g of an ideal gas A at 27

^{\circ} C

is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

The drain cleaner, Drainex contains small bits of aluum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at

20^{\circ} C

and one bar will be released when

0.15 g

of aluum reacts?

View all question

Chapter 6: Thermodynamics and Thermochemistry

36 questions

Chapter 7: Equilibrium

101 questions

Question

Medium

Solving time: 4 mins

Pressure of 1 g of an ideal gas A at 27 $^{\circ} C$ is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

Name: Video solution 1: [Solved] Pressure of 1 g of an ideal gas A at 27 ∘C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses? - Chemistry Part-I
Uploaded: 2023-03-09T21:52:26.000Z
Duration: 12 min
Description: Video solution 1: [Solved] Pressure of 1 g of an ideal gas A at 27 ∘C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses? - Chemistry Part-I

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Updated on: Mar 9, 2023

Book:

Chemistry Part-I (NCERT)

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Oliver Discussed

Pressure of 1 g of an ideal gas A at 27

^{\circ} C

is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

8 mins ago

Discuss this question LIVE

8 mins ago

Text solutionVerified

Let M and M' be the molar masses of ideal gases A and B respectively.
The number of moles of gas A and B are

\frac{1}{M}

and

\frac{2}{M ^{'}}

respectively.
Let P and P' be the pressures of gases A and B respectively.

P = 2 ba r

P + P^{'} = 3 ba r

P^{'} = 3 - 2 = 1 ba r

The ideal gas equations for two gases A and B are,

P V = n RT

......(i)

P^{'} V = n^{'} RT

......(ii)
Divide equation (i) by equation (ii).

\frac{P}{P ^{'}} = \frac{n}{n ^{'}} = \frac{1 \times M ^{'}}{2 \times M} = \frac{M ^{'}}{2 M}

\frac{M ^{'}}{M} = 2 \frac{P}{P ^{'}} = \frac{2 \times 2}{1} = 4

M^{'} = 4 M

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Practice more questions from Chemistry Part-I (NCERT)

0^{\circ} C

the density of certain oxide of a gas at

2

bar is same as that of dinitrogen at

5

bar. What is the molecular mass of the oxide?

Pressure of 1 g of an ideal gas A at 27

^{\circ} C

is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

The drain cleaner, Drainex contains small bits of aluum which react with caustic soda to produce dihydrogen. What volume of dihydrogen at

20^{\circ} C

and one bar will be released when

0.15 g

of aluum reacts?

View all

Practice questions on similar concepts asked by Filo students

Question 1

chapter STOICHIOMETRY 4 Marks SAQ6. A carbon compound contains

12.8%

carbon,

2.1%

hydrogen,

85.1%

bromine. The molecular weight of the compound is 187.9 . Calculate the molecular formula. Ans: Given that, Carbon,

C = 12.8%

Oct-21, May-17 Bromine,

Br = 85.1%

Hydrogen,

H = 2.1%

Molecular weight of compound

= 187.9

The empirical formula of the given compounds is calculated as, च2M

s.No.	Element	\begin{tabular}{c} \%
Mass

& & & & \\ \hline 1 &

C

& 12.8 & 12 &

\frac{12.8}{12} = 1.06

\frac{1.06}{1.06} = 1

& 1 \\ \hline 2 &

H

& 2.1 & 1 &

\frac{2.1}{1} = 2.1

\frac{2.1}{1.06} = 1.98

& 2 \\ \hline 3 &

Br

& 85.1 & 80 &

\frac{85.1}{79.9} = 1.06

\frac{1.06}{1.06} = 1

& 1 \\ \hline \end{tabular} Ratio of atoms in the compound is

C : H : Br

121 The empirical formula of the compound is

CH_{2} Br

. Empirical formula weight

= 12 + 2 \times 1 + 80 = 94

n = \frac{Molecular weight of the compound}{Empirical formula weight} = \frac{187.9}{94} = 1.99 ≅ 2

⿹1M

∴

Molecular formula

= (Empirical formula)_{n} = (CH_{2} Br)_{2} = C_{2} H_{4} Br_{2}

У1M

Topic:

Coordination Compounds

View solution

Question 2

Which of the following is heterocyclic aromatic species ?

Topic:

General Organic Chemistry

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Question 3

The balanced chemical equation has to be derived from the expression for the equilibrium constant. Concept introduction: A system is said to be in equilibrium when all the measurable properties of the system remains unchanged with the time. Equilibrium constant is the ratio of the rate constants of the forward and reverse reactions at a given temperature. In other words it is the ratio of the concentrations of the products to concentrations of the reactants. Each concentration term is raised to a power, which is same as the coefficients in the chemical reaction . Consider the reaction where the reactant A is giving product P . A ⇌ P Rate of forward reaction = Rate of reverse reaction k f [ A ] =k r [ B ] On rearranging, [ A ] [ B ] = k f k r = K c Where, k f is the rate constant of the forward reaction. k r is the rate constant of the reverse reaction. K c is the equilibrium constant.

Topic:

Chemistry

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Question 4

Consider an aqueous solution of HF. The molar heat of formation for aqueous

HF

- 320.1 kJ / mol

.(a) What is the pH of a

0.100 M

solution of

HF

10 0^{\circ} C ?

(b) Compare with the pH of a

0.100 M

solution of HF at

2 5^{\circ} C

Topic:

Chemistry

View solution

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Question Text	Pressure of 1 g of an ideal gas A at 27 $^{\circ} C$ is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?
Updated On	Mar 9, 2023
Topic	States of Matter
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 1
Upvotes	178
Avg. Video Duration	12 min

Pressure of 1 g of an ideal gas A at 27 $^{\circ} C$ is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

Text solutionVerified

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Pressure of 1 g of an ideal gas A at 27 ∘C is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?

Text solutionVerified

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Pressure of 1 g of an ideal gas A at 27 $^{\circ} C$ is found to be 2 bar. When 2 g of another ideal gas B is introduced in the same flask at same temperature the pressure becomes 3 bar. Find a relationship between their molecular masses?