A 1500 L weather balloon is at 'a temperature of 290 K on the ground. As it rises the temperature drops. At 15,000 ft, the temperature is down to 210 K. What is the
volume at this elevation?

Equal numbers of moles of he(g), ar(g), and ne(g) are placed in a glass vessel at room temperature. if the vessel has a pinhole-sized leak, which of the following will be true regarding the relative values of the partial pressures of the gases remaining in the vessel after some of the gas mixture has effused?