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Calculate the molecular masses of the following compounds:

(a) Methane, CH

(b) Ethane, C2H

(c) Ethene, C2H

(d) Ethyne, C2H2 

(Atomic masses: C= 12u, H = 1u)

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a). Molecular mass of methane (CH4) = 12 + 4 = 16 u

(b). Molecular mass of ethane (C2H6) = 2 x 12 + 6 x 1 = 30 u 

(c). Molecular mass of ethane (C2H4) = 2 x 12 + 4 x 1 = 28 u 

(d). Molecular mass of Ethyne (C2H2) = 2 x 12 + 2 x 1 = 26 u

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