Chemistry - Mole Concept Question with Solution | TestHub

$$\begin{array}{rl}& \text{ Molecular weight of }{\mathrm{C}}_{60}{\mathrm{H}}_{122}=60\times 12+1\times 122\\ & =842\mathrm{g}{\mathrm{mol}}^{-1}\\ & \therefore \text{ Weight of }1\text{ mole of }{\mathrm{C}}_{60}{\mathrm{H}}_{122}\text{ molecules }=842\mathrm{g}\\ & \Rightarrow \text{ Weight of }6.023\times 10^{23}\text{ molecules }=842\mathrm{g}\\ & \Rightarrow \text{ Weight of }1\text{ molecule }=\frac{842}{6.023\times 10^{23}}\\ & =1.4\times 10^{-21}\mathrm{g}\\ & \end{array}$$