Question

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 ($n$) divided by volume of solution in liters ($V$), so $M = \frac{n}{V}$.

Step2: Identify Values

Here, $n = 7.0\ \text{mol}$ (moles of NaCl) and $V = 2.0\ \text{L}$ (volume of solution).

Step3: Calculate Molarity

Substitute values into formula: $M = \frac{7.0\ \text{mol}}{2.0\ \text{L}} = 3.5\ \text{mol/L}$.

Answer:

$3.5$