Answer
0.0675 M
Work Step by Step
$M_{i}V_{i}= M_{f}V_{f}$
$\implies M_{f}=\frac{M_{i}V_{i}}{V_{f}}=\frac{0.450\,M\times15.00\,mL}{100.00\,mL}$
$= 0.0675\,M$
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