Chemistry - Mole Concept Question with Solution | TestHub

Number of moles of ethane $\left({\mathrm{C}}_2{\mathrm{H}}_6\right)=\frac{75}{30}=2.5$ Volume of gas at S.T.P $=$ moles $\times 22.4\mathrm{L}$ $$\begin{array}{rl}& =2.5\times 22.4\\ & =56\mathrm{L}\\ & =56{\mathrm{dm}}^3\\ & \left(1\mathrm{L}=1{\mathrm{dm}}^3\right)\end{array}$$