Answer
5.1 M
Work Step by Step
$75.0 \text{ mL}*\frac{0.79 \text{ grams}}{1 \text{ mL}}*\frac{1 \text{ mol}}{46.07 \text{ grams}}=1.286 \text{ mol}$
$\frac{1.286 \text{ mol}}{0.2500 \text{ L}}=5.1$ M
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