Which of the following contains the least number of molecules?

$A$ sample of $[Cu(NH_3)_4]SO_4$ contains $2.4 \times 10^{24}$ ammonia molecules. The moles of $[Cu(NH_3)_4]SO_4$ in the given sample will be:

Which one of the following will have the largest number of atoms?
$(i)$ $1 \,g$ $Au_{(s)}$
$(ii)$ $1 \,g$ $Na_{(s)}$
$(iii)$ $1 \,g$ $Li_{(s)}$
$(iv)$ $1 \,g$ of $Cl_{2(g)}$

Find the number of molecules present in $70 \text{ g}$ of dinitrogen $(N_2)$.

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

Calculate the number of molecules in a gas sample having a volume of $1.12 \times 10^{-7} \, cc$ at $NTP$.