The volume of 400ml chlorine gas at 400mm hg is decrease to 200ml at constant tempature. what is the new gas pressure?

Which best describes why nh4+ can form an ionic bond with cl-?

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?