Question

Calculate the molecular mass of chloroform ${\mathrm{CHCl}}_3$ atomic masses C=12u, H=1u and Cl=35.5u

Answer 1

1. Molecular mass is the sum of the masses of all the individual atoms present in a molecule or compound.
2. The chemical formula of chloroform is ${\mathrm{CHCl}}_3$.
3. The atomic mass of carbon is 12 u.
4. The atomic mass of hydrogen is 1 u.
5. The atomic mass of chlorine is 35.5 u.

$\mathrm{Molecular}\mathrm{mass}\mathrm{of}\mathrm{chloroform}{\mathrm{CHCl}}_3=(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Carbon})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{hydrogen})\mathrm{x}1+(\mathrm{Atomic}\mathrm{mass}\mathrm{of}\mathrm{Chlorine})\mathrm{x}3$

$=(12\mathrm{x}1)+(1\mathrm{x}1)+(35.5\mathrm{x}3)$

.$=119.5\mathrm{g}/\mathrm{mole}$

The molecular mass of chloroform is 119.5 g/mole.