What is the mass percentage of carbon in urea | vedclass

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Question

(B) The molecular formula of urea is $NH_2CONH_2$.We know that the mass percentage of an element in a compound is given by:$	ext{Mass percentage} = \

Vedclass · Accepted Answer

$20.0$

Vedclass · Answer

(B) The molecular formula of urea is $NH_2CONH_2$.We know that the mass percentage of an element in a compound is given by:$	ext{Mass percentage} = \frac{	ext{Total mass of the element in one mole of compound}}{	ext{Molar mass of the compound}} 	imes 100$In one mole of urea $(NH_2CONH_2)$,there is $1$ mole of carbon atom.The molar mass of carbon is $12 \ g \ mol^{-1}$.The molar mass of urea is given as $60 \ g \ mol^{-1}$.Therefore,the mass percentage of carbon in urea $= \frac{12 \ g \ mol^{-1}}{60 \ g \ mol^{-1}} 	imes 100 = 20 \%$.Hence,option $B$ is correct.

What is the mass percentage of carbon in urea (in $\%$)? (molar mass of urea $= 60 \ g \ mol^{-1}$)

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