Calculate molecular mass of the compounds whose formulas are provided below:C2H4, H2O and CH3OH.

Calculate molecular mass of the compounds whose formulas are provided below:C2H4, H2O and CH3OH.

Ans.

1. Molecular mass of CO2 = Atomic mass of C + 2 × Atomic mass of O = 12 + 2 × 16   =  44 u
2. Molecular mass of C2H6 = 2 × Atomic mass of C + 6 × Atomic mass of H  = 2 × 12 + 6 × 1   = 30u
3. Molecular mass of C2H4 = 2 × Atomic mass of C + 4 × Atomic mass of H = 2 × 12 + 4 × 1   = 28u
4. 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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