The number of moles and volume in $56 \ g$ of nitrogen $(N_2)$ are respectively:

Calculate the mass of oxygen present in $0.1 \ mol$ of $Na_2CO_3 \cdot 10H_2O$. (in $g$)

The number of atoms present in a drop of water weighing $1.8 \ g$ is.....

The number of moles of $BaCO_3$ which contain $1.5$ moles of oxygen atoms is:

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

How many grams of $H_2O$ are present in $0.25 \ mol$ of it (in $g$)?