S C Kheterpal, S N Dhawan and, P N Kapil Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 9: PROBLEMS FOR PRACTICE

What is the mass of $0.5$ mole of ${\mathrm{CO}}_2$?

 What is the mass of $2.5$ moles of ${\mathrm{Cl}}_2$?

How many moles of atoms are contained in $0.8$ g of Iron?

Calculate the number of moles in $1\times {10}^{23}$ molecules of ${\mathrm{CO}}_2$.

Calculate the mass of molecules of ammonia.

How many molecules approximately do you expect to be present in a small sugar crystal which weights $10 \mathrm{mg}$?

How many molecules approximately do you expect to be present in one drop of water with $0.05 \mathrm{cc}$ volume?

$9.7\times {10}^{17}$ atoms of iron weight as much as $1 \mathrm{cc}$ of ${\mathrm{H}}_2$ at $\mathrm{STP}$ what is the atomic mass of iron?