When $1 \ L$ of $CO_2$ is heated with graphite,the volume of the gases collected is $1.8 \ L$. What will be the number of moles of $CO$ produced at $STP$?

Molarity of $0.2 \ N \ H_2SO_4$ is

The weight of a residue obtained by heating $2.76 \, g$ of silver carbonate is......$g$

The active mass of benzene $(C_6H_6 = 78)$ with a density of $1.56 \, g/mL$ is .......

What mass of $95 \%$ pure $CaCO_3$ will be required to neutralise $50 \ mL$ of $0.5 \ M \ HCl$ solution according to the following reaction? (In $g$)
$CaCO_{3(s)} + 2HCl_{(aq)} \rightarrow CaCl_{2(aq)} + CO_{2(g)} + H_2O_{(l)}$
[Calculate up to the second decimal place]

The combustion reaction of glucose is given as: (Molar mass of glucose = $180 \ g/mol$) $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O, \Delta H = -72 \ kcal$. The energy required for the production of $1.6 \ g$ of glucose is .......... $kcal$.