Question

Molarity of a solution that has $50millimoles$ of a solute dissolved in $10mL$ of solution is .

• A. $5M$
• B. $0.2M$
• C. $50M$
• D. $1M$

Answer 1

The correct option is A $5M$

We know that,
Molarity = $\frac{\text{Moles of solute}}{\text{Volume in litres of solution}}$
Milli moles = $\text{moles}\times {10}^3$
$\therefore \text{Molarity}=\frac{50\times {10}^{-3}}{10\times {10}^{-3}}=5M$