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mariahmimibrooks
20.02.2020 •
Chemistry
Study the balanced chemical reaction.
H2 + O2 → H2O2
(M H2 = 2.02 g/mol; M H2O2 = 34.02 g/mol)
If 100.0 g of hydrogen peroxide (H2O2) is produced, what percent of the product is hydrogen?
A) 50.0% is hydrogen.
B) 94.1% is hydrogen.
C) 5.94% is hydrogen.
D) 12.5% is hydrogen.
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Ответ:
Option C. 5.94% is hydrogen.
Explanation:
From the question given, we obtained the following:
Molar Mass of H2O2 = 34.02 g/mol
Molar Mass of H2 = 2.02 g/mol
Mass of H2O2 produced = 100g
H2 + O2 → H2O2
From the equation,
2.02g of Hydrogen produced 34.02g of H2O2.
Therefore, Xg of H2 will produce 100g of H2O2 i.e
Xg of H2 = (2.02x100)/34.02 = 5.94g
Now, we can calculate the percentage of H2 in H2O2 produced by doing the following:
% Mass of H2 in H2O2 = (5.94/100) x 100 = 5.94%
Ответ: