Question

What is the percent composition of hydrogen (H) in benzene (C6H6)?

Answer 1

Answer : The percent composition of hydrogen in benzene is, 7.69 %

Explanation: Given,

Molar mass of C = 12 g/mole

Molar mass of H = 1 g/mole

First we have to calculate the molar mass of benzene.

Molar mass of benzene$(C_6H_6)$ = $6(12)+6(1)=78g/mole$

Now we have to calculate the percent composition of hydrogen in benzene.

As we now that there are 6 number of carbon atoms and 6 number of hydrogen atoms.

The mass of hydrogen = $6\times 1=6g$

Formula used :

$\%\text{ Composition of hydrogen}=\frac{\text{Mass of hydrogen}}{\text{Molar mass of hydrogen}}\times 100$

Now put all the given values in this formula, we get the percent composition of hydrogen in benzene.

$\%\text{ Composition of hydrogen}=\frac{6}{78}\times 100=7.69\%$

Therefore, the percent composition of hydrogen in benzene is, 7.69 %

Answer 2

That's the answer on that picture