0.1 mole of a carbohydrate with empirical formula $C H_{2} O$ contains 1 g of hydrogen. What is its molecular formula?

C_{5} H_{10} O_{5}

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C_{6} H_{12} O_{6}

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C_{4} H_{8} O_{4}

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C_{3} H_{6} O_{3}

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Solution

The correct option is C $C_{5} H_{10} O_{5}$
$0.1 m o l e ⟶ 1 g \frac{1}{10} m o l e ⟶ 1 g 1 m o l e ⟶ 10 g N o w, C H_{2} O, 10 g H p r e s e n t S o, n = \frac{10}{2} = 5 C_{5} H_{10} O_{5}$

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