Ideal Gas Law: PV=nRT
R is the universal gas constant of 8.31.
T is temperature in Kelvins. ( add 273 to the Celsius temperature ( 273 +97 = 370).
Fill in the letters with the given information:
P(45.0) = (2.40)(8.31)(370)
Simplify the right side:
P(45.0) = 7379.28
Divide both sides by 45.0
P = 7379.28 / 45.0
P = 163.984
Round to 164
Answer is D.