A container has a volume of #3 L# and holds #7 mol# of gas. If the container is expanded such that its new volume is #15 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?
P is pressure
V is volume
n is mol
R is the universal gas constant
T is temperature.
P is the same in the 1st and 2nd situations. R and T are the same also (n is the moles in the second situation).