Question & Answer » Chemistry Questions » Calculate the molecular masses of H2, O2, Cl2, CO2, CH4, C2H6, C2H4, NH3, CH3OH

Calculate the molecular masses of H2, O2, Cl2, CO2, CH4, C2H6, C2H4, NH3, CH3OH

The molecular mass is the entire sum of the masses of the atoms or components in the molecule.

Atomic mass of different elements are as follows:

Element

Atomic Mass

Hydrogen

1 u

Oxygen

16 u

Chlorine

35 u

Carbon

12 u

Nitrogen

16 u

Molecular mass of H2=2 u

Molecular mass of H2= 2× Atomic mass of H

Molecular mass of O2=32 u

Molecular mass of O2= 2× Atomic mass of O

Molecular mass of Cl2=71 u

Molecular mass of Cl2= 2× Atomic mass of Cl

Molecular mass of CO2=44 u

Molecular mass of CO2= Atomic mass of C + 2× Atomic mass of O

Molecular mass of C2H6=30 u

Molecular mass of C2H6= 2 Atomic mass of C + 6 Atomic mass of H

Molecular mass of C2H4=28 u

Molecular mass of C2H4= 2 Atomic mass of C + 4 Atomic mass of H

Molecular mass of NH3=17 u

Molecular mass of NH3= Atomic mass of N + 3 Atomic mass of H

Molecular mass of CH3OH=32 u

Molecular mass of CH3OH= Atomic mass of C + Atomic mass of O + 4 Atomic mass of H