Question

Calculate the number of moles in 44.8 liters of carbon dioxide at S.T.P.

Answer 1

The volume of carbon dioxide gas = 44.8 L

Since at STP; 22.4 L = 1 mole of gas

$$\begin{gathered} \mathrm{Number}\mathrm{of}\mathrm{moles}\left(\mathrm{n}\right)=\frac{\mathrm{Volume}\mathrm{of}\mathrm{the}\mathrm{gas}\mathrm{at}\mathrm{S}.\mathrm{T}.\mathrm{P}.}{22.4} \\ \mathrm{Number}\mathrm{of}\mathrm{moles}\left(\mathrm{n}\right)=\frac{44.8}{22.4} \\ =2\mathrm{moles}\mathrm{of}{\mathrm{CO}}_2 \end{gathered}$$

Hence, the number of moles of ${\mathrm{CO}}_2$ at STP is 2.