answer and explanation
to determine the the solution of this problem we need to used the combined gas law which states :
P1V1/T1 = P2V2/T2
we can rearrange this and make T2 the subject of the formula like so:
T2 = (P2V2)T1/ P1V1
= (1atm x 1000ml)x 75/ 750 ml x 0.750 atm
= 133 degrees celcius