Question

o what volume must 175 L of air at 1.0 atm be compressed to yield a pressure of 5.2 atm? (You can assume constant temperature.)

Answer 1

as we know, 
                 P1V1=P2V2
                P1=1atm
                P2=5.2
                 V1=175
                    V2= required
   so put the values and grab your answer.....
   which should be nearly 33.6 L