Question

What is the percentage of sulphur in sulphuric acid $\left(H_{2}S{O}_4\right)$?

• A. 32.65%
  
• B. 31.5%
• C. 30%
• D. 25.8%

Answer 1

The correct option is A 32.65%

$H_{2}S{O}_4$

$1$ H atom molar mass $=1$

$1$ Sulphar atom molar mass $=32$

$1$ Oxygen atom molar mass $=16$

Total $=1\times 2+32+16\times 4$

$=98$

% Sulphar $=\frac{32}{98}\times 100$

$=32.65\%$

Hence, the correct option is $\text{A}$