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Chemistry Part-I

Some Basic Concepts of Chemistry

Calculate the number of atoms in each of the following. (i) 5

Chemistry Part-I

Class 11

NCERT

Chapter 1: Some Basic Concepts of Chemistry

44 questions

Use the data given in the following table to calculate the molar mass of naturally occurring argon isotopes.

Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.

A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives

3.38 g

carbon dioxide,

0.690 g

of water and no other products. A volume of 10.0\ L (measured at STP) of this welding gas is found to weigh

11.6 g

Calculate (i) empirical formula, (ii) molar mass of the gas and (iii) molecular formula.

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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

Chapter 6: Thermodynamics and Thermochemistry

36 questions

Chapter 7: Equilibrium

101 questions

Question

Easy

Solving time: 3 mins

Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.

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Updated on: Feb 22, 2024

Book:

Chemistry Part-I (NCERT)

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Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.

7 mins ago

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Text solutionVerified

(i) The number of atoms present in 52 mol of Ar are

52 \times 6.023 \times 1 0^{23} = 3.13 \times 1 0^{25}

atoms.
(ii) 52 u of He will contain

\frac{52}{4} = 13

atoms.
(iii) 52 g of He will contain

\frac{52}{4} \times 6.023 \times 1 0^{23} = 7.82 \times 1 0^{24}

atoms.

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Practice more questions from Chemistry Part-I (NCERT)

Use the data given in the following table to calculate the molar mass of naturally occurring argon isotopes.

Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.

A welding fuel gas contains carbon and hydrogen only. Burning a small sample of it in oxygen gives

3.38 g

carbon dioxide,

0.690 g

of water and no other products. A volume of 10.0\ L (measured at STP) of this welding gas is found to weigh

11.6 g

Calculate (i) empirical formula, (ii) molar mass of the gas and (iii) molecular formula.

View all

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Question Text	Calculate the number of atoms in each of the following. (i) 52 moles of Ar (ii) 52 u of He (iii) 52 g of He.
Updated On	Feb 22, 2024
Topic	Some Basic Concepts of Chemistry
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 9
Upvotes	1075
Avg. Video Duration	6 min

Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.

Text solutionVerified

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Calculate the number of atoms in each of the following. (i) 52 moles of Ar (ii) 52 u of He (iii) 52 g of He.

Text solutionVerified

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Calculate the number of atoms in each of the following.
(i) 52 moles of Ar
(ii) 52 u of He
(iii) 52 g of He.