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The empirical formula and molecular mass of a compound are CH_{2}O and 180 g respectively. What will be the molecular formula of the compound?

(i) C_{9}H_{18}O_{9}
(ii) CH_{2}O
(iii) C_{6}H_{12}O_{6}
(iv) C_{2}H_{4}O_{2}

Answers (1)

The answer is the option (iii) C_{6}H_{12}O_{6}


The empirical formula of CH_{2}O is CH_{2}O

Calculating empirical formula mass = 12+(1\times 2)+16=30g

Given: Molecular mass = 180g

n = Molecular mass/ empirical formula mass


Therefore, the Molecular formula

=n \times \mathrm{CH}_2 \mathrm{O}=6 \times \mathrm{CH}_2 \mathrm{O}=\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6


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