How many moles are in 566 grams of CO2? Molar mass of CO2 = 44.0 g/mol

The fact that the total amount of energy in a system remains constant is a(n)

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?

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?