The chloride of a metal is $MCl_2$. The formula of its phosphate will be:

The $NaNO_3$ weighed out to make $50 \ mL$ of an aqueous solution containing $70.0 \ mg$ $Na^{+}$ per $mL$ is $...... \ g$.
(Rounded off to the nearest integer) [Given : Atomic weight in $g \ mol^{-1}$ - $Na : 23$; $N : 14$; $O : 16$]

If the concentration of $Al^{+3}$ in an aqueous solution of $Al_2(SO_4)_3$ is $1.8 \ M$,what will be the concentration of $SO_4^{-2}$ ions (in $M$)?

$10 \ mL$ of a gaseous hydrocarbon on combustion gives $40 \ mL$ of $CO_{2(g)}$ and $50 \ mL$ of water vapour. The total number of carbon and hydrogen atoms in the hydrocarbon is:

What is $\Delta n$ for the combustion of $1 \ mole$ of benzene,when both the reactants and the products are in the gaseous state at $298 \ K$?

$20 \, cc$ of $CO_2$ are passed over red hot coke. The volume of $CO$ evolved is ............ $cc$.