Percent Composition of each element in H2O
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% of Oxygen
16 g O/18 g H2O *100 88.89% O in Water
Oxygen
16 x 1 = 16 g O in H2O
Hydrogen
1 x 2 = 2g H in H2O
Molar Mass of Water
2 + 16 = 18 g/mol of H2O
% of Hydrogen
2g H/18g H2o *100 = 11.11% H in Water