Question

How many grams of $NaOH$ are dissolved in 500 ml of solution having concentration of 0.2 M?

Answer 1

$Molarity=\frac{Weight}{GMwt}\times \frac{1000}{V}$

$0.2=\frac{Weight}{40}\times \frac{1000}{500}$

$Weight=4g$

4 g of $NaOH$ is dissolved.