Answer
a) $P_{T}$=0.89 atm
b) $V_{He and Ne}$ = 1.35
Work Step by Step
a) $P_{T}$=$P_{N_{2}}$ + $P_{He}$ +$P_{Ne}$
$P_{T}$=0.32 + 0.15 + 0.42
$P_{T}$=0.89
b) $\frac{P_{1}{V_{1}}}{T_{1}}$=$\frac{P_{2}{V_{2}}}{T_{2}}$
$V_{He and Ne}$=$\frac{P_{1}{V_{1}{T_{2}}}}{T_{1}{P{2}}}$
$V_{He and Ne}$=$\frac{(0.57)(2.5)(273.5)}{(288.15)(1)}$
$V_{He and Ne}$= 1.35L
