Answer
0.236 M
Work Step by Step
Using the equation for molarity:
$M_{i}V_{i}= M_{f}V_{f}$
$\implies M_{f}=\frac{M_{i}V_{i}}{V_{f}}=\frac{0.198\,M\times125\,mL}{105\,mL}$
$= 0.236\,M$
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