What is the number of moles of water molecules present in a mole of carnallite?

At the same temperature,$10 \ dm^3$ of $N_2$ gas and $10 \ dm^3$ of gas $x$ contain the same number of molecules. What is the gas $x$?

Arrange the following in order of increasing mass:
$I$. $1$ mole of $N_2$
$II$. $0.5$ mole of $O_3$
$III$. $3.011 \times 10^{23}$ molecules of $O_2$
$IV$. $0.5$ gram atom of $O$

How many moles of water are present in $180 \ g$ of water?

What is the weight in $g$ of $2.01 \times 10^{23}$ molecules of $CO$?

From the following,the largest number of atoms are in