Normality of $2 \, M$ sulphuric acid is

How much volume of water is to be added to dilute $10 \, mL$ of $10 \, N \, HCl$ to make it decinormal? .............. $mL$

What is the volume in $dm^3$ occupied by $3 \ mol$ of ammonia gas at $STP$?

What volume of $0.8 \ M$ solution contains $0.1 \ mole$ of the solute? (in $mL$)

$16.8 \ L$ of a gas mixture containing $H_2$ and $O_2$ is formed at $NTP$ by the electrolysis of water. What is the mass of the electrolysed water in $g$?

An aqueous solution of $4.5 \ g$ oxalic acid $(H_2C_2O_4)$ is made up to $250 \ mL$. Calculate the volume of $0.1 \ N$ $NaOH$ required to neutralize completely $20 \ mL$ of this solution.