Question

Determine la fórmula molecular de cada uno de los compuestos siguientes a partir de los datos experimentales:
A. 80.0% de carbono, 20.0% de hidrógeno y una masa molecular de 30.0 uma

Es urgente, por favor.

Answer 1

A. 80.0% de carbono, 20.0% de hidrógeno
masa molecular de 30.0 uma

C: 80.0 g/ 12 g/mol = 6.667 mol
H: 20.0 g 7 1 g/mol = 20.0 mol

dividir

C: 6.667 mol / 6.667 mol = 1
H: 20.0 mol / 6.667 mol = 3

FE: CH3

MmFE
C: 1 x 12 = 12 g/mol
H: 3 x 1 = 3 g/mol
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     Mm = 15 g/mol

n = 30 / 15 = 2

FM: (CH3)2 = C2H6