Textbook Problem

Calculate the concentration in $\%\left(\text{w}/\text{v}\right)$ of the following solutions:

a. $\text{150}\text{.}\text{mL}$ of solution contains $\text{7}\text{.50}\text{g}$ of dissolved solid ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$.

b. $\text{150}\text{.}\text{mL}$ of solution contains $\text{7}\text{.50}\text{g}$ of any dissolved solid solute.

c. $\text{350}\text{.}\text{mL}$ of solution contains $\text{30}\text{.7}\text{g}$ of dissolved solid solute.