Plz hurry it's !
this equation indicates that the reaction gives off heat. what is this type of reaction called? c3h8 +? o2 → 3co2 + 4h2o + heat a. synthesis reaction b. endothermic reaction c. exothermic reaction d. decomposition reaction

The starting materials in a nuclear change have a total mass of 2.3465 x 10-27 kg. after the change, the resulting materials have a mass of 2.3148 x 10-27 kg. how much energy was released during the change? 2.85 x 10-12 2.08 * 10-10 j 0 211 * 10-10 j 8.56 * 10-43