Question

If the formula weight of ${H_{2}SO}_4$ is 98, then the amount of acid present in 400 ml of 0.1 molar solution of acid will be:

• A. $2.45g$
• B. $3.92g$
• C. $4.90g$
• D. $9.80g$

Answer 1

Answer: (B)

$3.92g$

$Molarity=\frac{Weight}{Molecularwt}\times \frac{1000}{V\left(ml\right)}$

$0\cdot 1=\frac{W}{98}\times \frac{1000}{400}$

$W=\frac{98\times 4\times 0\cdot 1}{10}$

$=3\cdot 92g$

So, the correct option is $B$