Question

Un compuesto tiene por fórmula mínima CH. Si su masa molecular es 78, determine su fórmula molecular.

Answer 1

FE: CH

1. Calcular Mm FE

C: 1 x 12 = 12 g/mol

H: 1 x 1 = 1 g/mol

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Mm = 13 g/mol

2. calcular n

n = Mm compuesto / Mm FE

n = 78 g/mol / 13 g/mol

n = 6

3. FM: (CH)n = (CH)₆ = C₆H₆