A sample of oxygen at 32◦C occupies 340 mL.

Question

If this sample later occupies 1064 mL at 57◦C
and 1.2 atm, what was its original pressure?

Answer 1

P1*V1/T1=P2*V2/T2

P1= P2*V2*T1/(T2*V2)
change temps to kelvins, then get your calculator out.