A balloon with a volume of 1 L is filled with a gas that has a pressure of a 4 pa what is the new pressure of the gas if the balloon is squeezed down to a volume of .6 L?
P1 V1 = P2 V2 at constant temperature and number of gas molecules for a perfect gas
4 * 1 = P2 * 0.6
so
P2 = 4 / 0.6 Pascals