Is this reaction endothermic or exothermic
d) nh4no3 (s)  nh4+ (aq) + no3− (aq) [note, this is the reaction that takes place in a cold pack]

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?

Can you guys answer these questions i need it before 1: 00pm

Weight is a measure of: inertia force matter mass