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2. plantear regla de tres para obtener el porcentaje de cada elemento del compuesto
EJEMPLO: H2O
Mm H2O
H: 2 x 1 = 2 g/mol
O: 1 x 16 = 16 g/mol
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Mm = 18 g/mol
hidrogeno
18 g ---- 100 %
2 g ---- x
x = 11.11 %
Oxigeno
18 g --- 100 %
16 g ---- x
x = 88.89 %
espero ayudar....