The number of moles of hydrogen molecules required to produce $20$ moles of ammonia through Haber's process is

How many grams of $NaOH$ are equivalent to $100 \, mL$ of $0.1 \, N$ oxalic acid?

What is the mass of $33.6 \ dm^3$ of methane gas at $S.T.P.$?

The number of molecules in $100 \, mL$ of $0.02 \, N$ $H_2SO_4$ is .....

For the complete combustion of $15 \ mL$ of a gaseous hydrocarbon at $300 \ K$ and $1 \ atm$ pressure,$375 \ mL$ of air containing $20\% \ O_2$ by volume is required. After combustion,the gases occupy $330 \ mL$. Assuming that the water formed is in liquid state and the volumes are measured at the same temperature and pressure,find the formula of the hydrocarbon.

$23 \ g$ of $Na$ metal reacts with ethanol to produce which of the following?