2. Calculate the heat of the reaction for the following reaction:
Na2O(s) + SO2(g) → Na2SO3(s)
AH = ? kJ/mol
Use heat of formation values. Is this reaction exothermic or endothermic? -390.0kJ/mol

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Which statement describes covalent bases

Organisms are classified as producer or consumers according to the way they ?