Question

Calculate the molecular mass of CH₄.

Answer 1

1. Molecular mass is the sum of the masses of all the individual atoms present in a molecule or compound.
2. Methane is a hydrocarbon which belongs to alkane.
3. The chemical formula of methane is ${\mathrm{CH}}_4$.
4. The atomic mass of Carbon C is 14 u.
5. The atomic mass of hydrogen H is 1 u.
6. $\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{methane}{\mathrm{CH}}_4=(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{carbon})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{hydrogen}\mathrm{H})\mathrm{x}4$

$=(12\mathrm{x}1)+(1\mathrm{x}4)$

$=16\mathrm{g}/\mathrm{mole}$

The molecular mass of methane ${\mathrm{CH}}_4$ is 16 g/mole.