Calculate the mass in $kg$ of $4.48 \ dm^3$ of carbon dioxide $(CO_2)$ at $STP$.

Equal weights of methane and oxygen are mixed in an empty container at $25\,^{\circ}C$. The fraction of the total pressure exerted by oxygen is

The volume of $0.1 \, M$ $H_2SO_4$ that is needed to completely neutralize $40 \, mL$ of $0.2 \, M$ $NaOH$ is $..... \, mL$.

How many grams of $NaCl$ are decomposed by $4.9 \ g$ of $H_2SO_4$ to produce sodium hydrogen sulfate and $1.825 \ g$ of $HCl$? $[Na = 23, Cl = 35.5, S = 32, H = 1, O = 16]$

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 .......... $kcal$.

$100 \, mL$ of $0.1 \, N \, HCl$ is neutralized by $0.2 \, N \, NaOH$ solution. After adding $30 \, mL$ of $NaOH$ solution,the neutralization is continued using $0.25 \, N \, KOH$. Calculate the volume of $KOH$ in $mL$ required to complete the neutralization.