Question

Porcentaje de magnesio en el cloruro de magnesio !

Answer 1

1. calcular la Mm del MgCl2

Mg: 1 x 24.30 = 24.30 g/mol
Cl:  2 x  35.45 = 70.9 g/mol
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               Mm = 95.20 g/mol

2. calcular % de cada elemento

Magnesio

95.20 g  ------  100 %
24.30 g  ------     x

  x = 25.52 % Mg

Cloro

95.20 g ---- 100 %
70.90 g ----     x

     x = 74.47 % Cl