Answer:
1280L
Explanation:
Given parameters:
Initial pressure  = 0.727atm
Temperature  = 26.9°C
Initial volume  = 726mL  = 0.726L
New pressure  = 0.412atm
Unknown:
New volume of the gas sample  = ?
Solution:
To solve this problem, we apply boyles law;
      P1V1  = P2V2
P and V are pressure and temperature
1 and 2 are initial and new state
       0.727 x 0.726  = 0.412 x V2
          V2  = 1.28mL  = 1280L
