Question

Determinar la formula molecular de un compuesto cuya forma empírica es P2 O5 y su masa molar es de 284 g/mol.

Answer 1

FE: P2O5

1. calcular Mm FE

P: 2  x 30.97 g/mol = 61.94 g/mol
O: 5 x 16 g/mol = 80 g/mol
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                  Mm = 141.94 g/mol

2. calcular n = Mm compuesto / Mm FE

n = 284 g/mol / 141.94 g/mol

n = 2

3. FM: (P2O5)2 = P4O10