composicion porcentual del oxido per bromico
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Br2O7
1. calcular Mm
Br: 2 x 80 = 160 g/mol
O: 7 x 16 = 112 g/mol
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Mm = 272 g/mol
2. calcular %
% bromo
272 g ----- 100 %
160 g ----- x
x = 58.82 % Br
% Oxígeno
272 g ----- 100 %
112 g ----- x
x = 41.17 % O
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