Question

whats the percent composition of sulfur in h₂so₄?
a) 2.1%
b) 65.2%
c) 32.7%
d) 00 10/

Explanation:

Step1: Calculate molar mass of \(H_2SO_4\)

Molar mass of \(H = 1\space g/mol\), \(S = 32\space g/mol\), \(O = 16\space g/mol\).
Molar mass of \(H_2SO_4 = 2\times1 + 32 + 4\times16 = 2 + 32 + 64 = 98\space g/mol\).

Step2: Calculate mass of sulfur in \(H_2SO_4\)

There is 1 S atom, so mass of S is \(32\space g/mol\).

Step3: Calculate percent composition of S

Percent composition \(=\frac{\text{Mass of S}}{\text{Molar mass of }H_2SO_4}\times100\%=\frac{32}{98}\times100\%\approx32.7\%\).

Answer:

C) 32.7%