Percentage composition of hydrogen in benzene C 6 H 6 is -A- 50 -B- 5 -C- 8 -D- 7-7 -

The correct option is D 7.7%Molecular mass of benzene is = (12 × 6) + (6 × 1) = 78 u Mass percentage of an element= Mass of an element/Mass of compound× 100 = ...

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Chemistry

Zinc Ion

Percentage co...

Question

Percentage composition of hydrogen in benzene ( $C_{6} H_{6}$ ) is :

8 %

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7.7 %

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50 %

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5 %

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Solution

The correct option is B $7.7 %$
Molecular mass of benzene is $= (12 \times 6) + (6 \times 1) = 78 u$

Mass percentage of an element= $\frac{Mass of an element}{Mass of compound} \times 100$ = $\frac{6}{78}$ $\times 100$ $= 7.7 %$

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Percentage composition of hydrogen in benzene (C6H6) is :

The correct option is B 7.7%Molecular mass of benzene is =(12×6)+(6×1)=78 u Mass percentage of an element= Mass of an elementMass of compound×100 = 678 ×100=7.7%

Percentage composition of hydrogen in benzene ( $C_{6} H_{6}$ ) is :

The correct option is B $7.7 %$
Molecular mass of benzene is $= (12 \times 6) + (6 \times 1) = 78 u$

Mass percentage of an element= $\frac{Mass of an element}{Mass of compound} \times 100$ = $\frac{6}{78}$ $\times 100$ $= 7.7 %$