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

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

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Standard XII

Chemistry

Stoichiometric Calculations

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