What is the final, balanced equation that is formed by combining these two half reactions?

Calcium hydride (cah2) reacts with water to form hydrogen gas: cah2(s) + 2h2o(l) → ca(oh)2(aq) + 2h2(g) how many grams of cah2 are needed to generate 45.0 l of h2 gas at a pressure of 0.995 atm and a temperature of 32 °c?

Which process describes vaporization that takes place below the surface of a liquid? condensation melting boiling evaporation

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.