The empirical formula of a carbohydrate is CH | vedclass

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Question

(A) Given that $0.1 \, 	ext{mol}$ of carbohydrate contains $1 \, g$ of hydrogen,then $1 \, 	ext{mol}$ of carbohydrate contains $10 \, g$ of hydrogen

Vedclass · Accepted Answer

$C_5H_{10}O_5$

Vedclass · Answer

(A) Given that $0.1 \, 	ext{mol}$ of carbohydrate contains $1 \, g$ of hydrogen,then $1 \, 	ext{mol}$ of carbohydrate contains $10 \, g$ of hydrogen.The empirical formula is $CH_2O$,so the molecular formula can be represented as $(CH_2O)_n$ or $C_nH_{2n}O_n$.The number of hydrogen atoms in $1 \, 	ext{mol}$ of the compound is $2n \, 	ext{mol}$.Since the molar mass of hydrogen is $1 \, 	ext{g/mol}$,the mass of hydrogen is $2n 	imes 1 \, 	ext{g} = 10 \, 	ext{g}$.Solving for $n$: $2n = 10$,which gives $n = 5$.Therefore,the molecular formula is $C_5H_{10}O_5$.

The empirical formula of a carbohydrate is $CH_2O$. If $0.1 \, \text{mol}$ of this carbohydrate contains $1 \, g$ of hydrogen,what is its molecular formula?

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