what is the molar concentration of a solution that contains 7.0 mol nacl in a total volume of 2.0 l? ? (mol/l)

Explanation:

Step1: Recall Molarity Formula

Molarity ($M$) is defined as moles of solute per liter of solution, so the formula is $M = \frac{n}{V}$, where $n$ is moles and $V$ is volume in liters.

Step2: Substitute Values

Given $n = 7.0\ \text{mol}$ and $V = 2.0\ \text{L}$, substitute into the formula: $M=\frac{7.0\ \text{mol}}{2.0\ \text{L}}$.

Step3: Calculate Result

Divide 7.0 by 2.0: $\frac{7.0}{2.0}=3.5$.

Answer:

3.5