Question

Calculate the number of moles present in $4.9g$ of $H_{2}S{O}_4$.

• A. $0.01$ moles
• B. $0.02$ moles
• C. $0.05$ moles
• D. $0.03$ moles

Answer 1

Answer: (C)

$0.05$ moles

Given that:

$4.9g{H}_{2}S{O}_4$

atomic weight $=2+32+4\times 16$

$=98g/mol$

Moles $=\frac{\text{gram weight}}{\text{atomic weight}}$

$=\frac{4.9}{98}=0.05moles$
Option C is correct.