The percentage of hydrogen in H $_{2}$ O is:

44.45

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5.55

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88.89

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11.11

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Solution

The correct option is D 11.11
There is also one mole of oxygen atoms weighing 16.00 grams in the mole of water. To get the percentage of hydrogen, divide the 2.016 by 18.015 and multiply by 100.
$∴ p e r c e n t a g e o f h y d r o g e n = \frac{2.018}{18} \times 100 = 11.1$ %

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