The mass of $0.1 \ mol$ of methane $(CH_4)$ is .......... $g$.

What is the numerical value of $\frac{N}{n}$? (Where $N$ is the number of molecules in a given gas sample and $n$ is the number of moles of the gas.)

The number of molecules and atoms present in $7.1 \ g$ of chlorine gas $(Cl_2)$ are respectively:

$10 \ g$ each of $CO_2$,$NH_3$,and $O_2$ were taken in three separate flasks. What is the correct decreasing order of the number of atoms?

The number of atoms in $4.25 \ g$ of $NH_3$ is approximately

What is the number of molecules of $SO_2$ present in $64 \ g$ of $SO_2$?