Answer: 1.375 atm
Explanation:
Given that,
Original volume V1 = 2.0 L
original pressure P1 = ?
New volume V2 = 5.5L
New pressure P2 = 0.5 atm
Since pressure and volume are involved while temperature is constant, apply Boyle's law
P1V1 = P2V2
P1 x 2.0 L = 0.5 atm x 5.5L
P1 x 2.0 L = 2.75 atmL
P1 = 2.75 atmL / 2.0 L
P1 = 1.375 atm
Thus, the original pressure of the hydrogen gas is 1.375 atm
