What are the percentage compositions of hydrogen and oxygen in water $(H_{2} O)$ ?
$(H = 1, O = 16)$

11.1, 88.9

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11.2, 88.8

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11, 89

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11.3, 88.7

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Solution

The correct option is A 11.1, 88.9
Molecular weight of $H_{2} O = 2 + 16 = 18 g$
$18 g$ of $H_{2} O$ contains $2 g$ of $H$ and $16 g$ of $O$
$∴$ % of $H = \frac{2}{18} \times 100 = 11.1$ %
% of $O = \frac{16}{18} \times 100 = 88.9$ %

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What are the percentage compositions of hydrogen and oxygen in water (H2O)? (H=1, O=16)

The correct option is A 11.1, 88.9Molecular weight of H2O=2+16=18g18g of H2O contains 2g of H and 16g of O∴ % of H=218×100=11.1%% of O=1618×100=88.9%

What are the percentage compositions of hydrogen and oxygen in water $(H_{2} O)$ ?
$(H = 1, O = 16)$

The correct option is A 11.1, 88.9
Molecular weight of $H_{2} O = 2 + 16 = 18 g$
$18 g$ of $H_{2} O$ contains $2 g$ of $H$ and $16 g$ of $O$
$∴$ % of $H = \frac{2}{18} \times 100 = 11.1$ %
% of $O = \frac{16}{18} \times 100 = 88.9$ %