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Q. What is the molarity of $H_2SO_4$ solution that has a density $1.84\, $ $g/cc$ at $35^{\circ}C$ and contains $98\%$ by weight?

Some Basic Concepts of Chemistry

Solution:

Molarity $ = \frac{(\% w/w) \times \text{density} \times 10}{\text{Molar mass of solute}}$
$ = \frac{98 \times 1.84 \times 10}{98}$
$ = 18.4 \,M$