The orbital radius of venus is 0.72 au. what is this distance in kilometers? (one au is about 150 million kilometers.) -10.8 kilometers -10.8 million kilometers -108 kilometers -108 million kilometers

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?