Calculate the mass of Na2O needed to release 105 kJ of heat energy according to the following reaction: Na2O (s) + 2HI (g) → 2NaI (s) + H2O (l) ΔH = -502 kJ

13.0 g
155 g
97.4 g
24.8 g

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma