2Na + 2H20 --> 2NaOH) + 1H2 Given the reaction above...
When 62.1 g of sodium is dropped into 100.0 g of water what mass of the excess reactant that will be
left over once ALL of the limiting reactant has been consumed?

Bose-einstein condensation occurs at what temperature?

Define dew point. i am writing this part to be able to ask the question

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?