Answer
100 L
Work Step by Step
Let $P_{1}$ = 760 mmHg = 1 atm, $V_{1}$ = 50L, $P_{2}$ = 0.5 atm & $V_{2}$ = ?
Using gas Law Equation $P_{1}V_{1}=P_{2}V_{2}$, we have:
1 atm x 50L = 0.5 atm x $V_{2}$
$V_{2}$ = 1 atm / 0.5 atm x 50L
= 100 L