What is the weight of $1 \times 10^{22}$ molecules of $CuSO_4 \cdot 5H_2O$ in grams?

Consider two sealed jars of equal volume. One contains $2 \ g$ of hydrogen at $200 \ K$ and the other contains $28 \ g$ of nitrogen at $400 \ K$. The gases in the two jars will have

$10 \ g$ 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?

What is the number of moles of $Cl$ atoms and $N$ atoms respectively present in $n$ moles of tear gas?

Two bulbs $B_1$ and $B_2$ contain $10 \ g$ each of $O_2$ and $O_3$ respectively. Which bulb contains a greater number of molecules and atoms?

If $10^{20}$ grains are distributed in one second,then the time taken to distribute an Avogadro number of grains is ........ hours.