Which of the following contribute to acid rain

Which of these conditions most likely produces an unstable isotope?

Displacement is the slope of a velocity vs. time graph a. true b. false

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?