Express the following in gram:

${10}^{-2}$ gram-atom of sodium

Express the following in gram:

$112 \mathrm{L} {\mathrm{NH}}_3$ at STP

Calculate the number of molecules in the following:

$16$ grams ${\mathrm{CO}}_2$

Calculate the number of molecules in the following:

$7$ grams ${\mathrm{N}}_2$

Calculate the number of molecules in the following:

$5.6$ litres $\mathrm{HCl}$ at STP

Which of the following has greater number of molecules?

$17$ grams ${\mathrm{H}}_2\mathrm{S}$ and $17$ grams ${\mathrm{NH}}_3$

Which of the following has greater number of molecules?

At STP $5.6$ litres ${\mathrm{SO}}_2$ and $8$ grams ${\mathrm{SO}}_2$

Which of the following has greater number of molecules?

$4$ grams calcium and $4$ grams ${\mathrm{O}}_2$

Which of the following has greater number of molecules?

$0.5$ moles ${\mathrm{N}}_2$ and $7$ grams ${\mathrm{N}}_2$