What is the mass in grams of $0.25 \ mol$ water (in $g$)?

The mass of $0.1 \ mol$ of methane $(CH_4)$ is .......... $g$.

How many moles of $Al_2(SO_4)_3$ are present in $50 \ g$ of the substance?

Which of the following contains the maximum number of atoms?

In a flask,the weight ratio of $CH_{4(g)}$ and $SO_{2(g)}$ at $298 \ K$ and $1 \ bar$ is $1:2$. The ratio of the number of molecules of $SO_{2(g)}$ and $CH_{4(g)}$ is

$A$ person adds $1.71 \ g$ of sugar $(C_{12}H_{22}O_{11})$ to sweeten their tea. How many carbon atoms are added? (Molar mass of sugar $= 342 \ g/mol$)