Question

hallar el porcentaje de calcio de existe en :CaCO3.p.pa(Ca=40,O=16 !

Answer 1

1. Calcular la Mm del CaCO3

Ca: 1 x 40 = 40 g/mol

C: 1 x 12 = 12 g/mol

O: 3 x 16 = 48 g/mol

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Mm = 100 g/mol

Calcio

100 g ---- 100 %

40 g ----- x

x = 40 % Ca