The number of $Cl^{-}$ ions in $333 \ g$ of anhydrous $CaCl_2$ will be ................ $N_A$.

What is the number of moles present in $1 \ m^3$ of any gas at $STP$?

If one atom of an element $X$ weighs $6.643 \times 10^{-23} \ g$,then find the number of moles of atoms in $50 \ kg$ of element $X$. (in $moles$)

How many moles of carbon atoms are present in $3.6 \ kg$ of carbon?

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

How many moles are present in $0.224 \ L$ of an ideal $H_2$ gas at $STP$ (in $mol$)? (Assume molar volume $= 22.4 \ L \ mol^{-1}$)