Answer
33.8 kPa
Work Step by Step
We find:
$P_{1}V_{1}=P_{2}V_{2}$ (at constant n and T)
$\implies P_{2}=\frac{P_{1}V_{1}}{V_{2}}$
$=\frac{(105\,kPa)(0.725\,L)}{2.25\,L}$
$=33.8\,kPa$
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