The empirical formula of a compound is $C H_{2} O_{2}$ . What could be its molecular formula?

C_{2} H_{2} O_{2}

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C_{2} H_{2} O_{4}

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C_{2} H_{4} O_{4}

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C H_{4} O_{4}

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Solution

The correct option is C $C_{2} H_{4} O_{4}$
Empirical formula is a chemical formula showing the simplest ratio of elements in a compound.
Thus molecular formula=(Empirical formula) $_{n}$
n=integer
Empirical formula= $C H_{2} O_{2}$
for n=2,
Molecular formula= $(C H_{2} O_{2})_{2} = C_{2} H_{4} O_{4}$

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