$A$ solution of sulfuric acid contains $80\%$ $H_2SO_4$ by weight and has a specific gravity of $1.71$. What is its normality?

Calculate percentage atom economy when $46 \ g$ ethanol is obtained from $64.5 \ g$ chloroethane and $56 \ g$ $KOH_{(aq)}$. (in $\%$)

What are the active masses of methyl alcohol $(CH_3OH)$ and carbon tetrachloride $(CCl_4)$ respectively,if their densities are $0.5 \, g/mL$ and $1.3 \, g/mL$?

The amount of calcium oxide produced on heating $150 \ kg$ of limestone ($75 \%$ pure) is $........... \ kg$ $(Nearest \ integer)$. Given: Molar mass (in $g \ mol^{-1}$) of $Ca = 40, O = 16, C = 12$.

Dissolving $1.24 \ g$ of white phosphorus in boiling $NaOH$ solution in an inert atmosphere gives a gas $Q$. The amount of $CuSO_4$ (in $g$) required to completely consume the gas $Q$ is. . . . [Given: Atomic mass of $H = 1, O = 16, Na = 23, P = 31, S = 32, Cu = 63$]

What is the volume of $22.4 \, L$ of water vapor at $NTP$ when it is condensed into liquid water?