Answer:

Step-by-step explanation:
Since constant temperature was assumed, the new volume can be found by using the formula

where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
From the question
P1 = 1.9 atm
V2 = 3.8 L
P2 = 1

We have the final answer as
7.2 L