Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 12

EASY

JEE Main

IMPORTANT

Earn 100

Find the ratio of the number of molecules contained in $1 g$ of ${NH}_{3}$ and $1 g$ of $N_{2}$ .

50% studentsanswered this correctly

Important Questions on Elementary Problems Based on Definition of Mole: The Mole Concept

HARD

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 13

How many molecules of

{CO}_{2}

are contained in one liter of air if the volume content of

{CO}_{2}

is

0.03 %

at

NTP

is

p \times 10^{18}

. Find out the value of p?

EASY

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 14

Is the number of molecules in

1 kg

of

H_{2}

and

1 kg

of

O_{2}

the same? What is the ratio of weights of

H_{2}

and

O_{2},

the mixture of which contains equal number of molecules of each gas?

EASY

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 15

The measured density at

NTP

of a gaseous sample of a compound was found to be

1.78 g / L .

What is the weight of

1

mole of the gaseous sample?

EASY

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 16

If the concentration of a solution is $2 M$ . Calculate the number of milli-moles present in $2 litres$ of the solution.

EASY

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 17

The number of moles of oxygen are contained in one litre of air is $x \times 10^{- 3}$ , if its volume content is $21 %$ at $NTP$ . Find the value of $x$ .

Round off your answer to the nearest integer.

MEDIUM

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 18

How many atoms do mercury vapor molecules consist of if the density of mercury vapor relative to air is

6.92 ? (Hg = 200)

. The average mass of air is

29 g / mole .

MEDIUM

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 19

Calculate the total number of atoms in $0.5 mole$ of $K_{2} {Cr}_{2} O_{7}$ .

Divide the final answer by $10^{24}$ .

Round off your answer to the nearest integer.

EASY

JEE Main

IMPORTANT

Modern Approach to Chemical Calculations>Chapter 1 - Elementary Problems Based on Definition of Mole: The Mole Concept>PROBLEMS>Q 20

What is the volume of

6 g

of hydrogen at

1 atm

and

0 ° C in L ?