A wheel has volume 500 cm3 and the initial pressure inside of it is 0.5 atm. The wheel is pumped using a pump having volume 50 cm3. The atmospheric pressure is 76 cmHg and there is no change in temperature. What is the pressure of the wheel after being pumped 4 times?
PV = nRT
The Attempt at a Solution
I don't know how to set up the equation.
After being pumped 4 times, the final volume of wheel will be: 500 + 4 x 50 = 700 cm3??
There will be change of n because more molecules of gas inside the wheel after pumping so the equation will be:
P1.V1 / n1 = P2.V2 / n2 ??
There is no information about the moles and I don't know how to use information about given from the question.