When $CO_2$ is bubbled through $0.205 \ mol$ of $Ba(OH)_2$,how many grams of $BaCO_3$ will be produced?

At $T \ K$,$100 \ L$ of dry oxygen is present in a sealed container. It is subjected to silent electric discharge,until the volumes of oxygen and ozone become equal. What is the volume (in litres) of ozone formed at $T \ K$?

$8 \ g$ of $CH_4$ is completely burnt in air. The number of moles of water produced are $.....$

The reaction of $1 \ mol$ of magnesium nitride with excess water gives:

The molarity of a $NaOH$ solution prepared by dissolving $4 \ g$ of it in $250 \ mL$ of water is: (in $M$)

$20 \ mL$ of $CO_2$ gas are passed over excess of red hot coke. The volume of $CO$ evolved is ............. $mL$.
$CO_{2(g)} + C_{(s)} \to 2CO_{(g)}$