The weight of $112 \ cm^3$ of $CH_4$ gas at $STP$ is ...... $g$.

$7.0 \, g$ of $N_2$,$8.0 \, g$ of $O_2$,and $34.0 \, g$ of $NH_3$ are present in a $1 \, L$ vessel. The active masses in $mol \, L^{-1}$ are respectively:

The atomic weights of two elements $A$ and $B$ are $40$ and $80$ respectively. If $x \ g$ of $A$ contains $y$ atoms,how many atoms are present in $2x \ g$ of $B$?

What is the number of atoms present in $2.24 \ dm^3$ of $NH_3$ $(g)$ at $STP$?

The total number of molecules of $SO_2Cl_2$ in $13.5 \ g$ of sulfuryl chloride is ..... (in terms of $N_A$) (in $N_A$)

If $24 \times 10^{23}$ molecules are removed from $50 \ g$ of hydrogen gas $(H_2)$,how many moles of hydrogen remain?