Weight percentage of hydrogen in water:-

11.1%

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88.8%

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78.4%

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20.4%

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Solution

The correct option is A
11.1%

Weight % = $\frac{W e i g h t o f t o t a l h y d r o g e n}{W e i g h t o f w a t e r} \times 100$ %

So weight % of hydrogen in water ( $H_{2} O$ ) = $\frac{2 u}{18 u} \times 100$ % = 11.1%

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