Question

$3$ g of salt of molar mass $30$ is dissolved in $250$ g of water. The molality of a solution is $x$M. The value of $10x$ is ____.

Answer 1

3 grams of salt of molecular weight $30$ is dissolved in $250$ g of water.

$Molality\left(m\right)=\frac{3}{30}\times \frac{1}{250}\times 1000=0.4$

The molality of the solution is $0.4$.

So, the answer is $4$.