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

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Molecular mass of H2 = 2 × Atomic mass of H 

= 2 × 1 = 2u 

Molecular mass of O2 = 2 × Atomic mass of O 

= 2 × 16 = 32u 

Molecular mass of Cl2 = 2 × Atomic mass of Cl 

= 2 × 35.5 = 71 u 

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

= 12 + 2 × 16 = 44 u 

Molecular mass of CH4 = Atomic mass of C + 4 × Atomic mass of H 

= 12 + 4 × 1 = 16 u 

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

= 2 × 12 + 6 × 1 = 30u 

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

= 2 × 12 + 4 × 1 = 28u 

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

= 14 + 3 × 1 =17 u 

Molecular mass of CH3OH Atomic mass of C+4 ×Atomic mass of H+Atomic mass of O = 12 + 4 × 1 + 16 = 32 u

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