In the laboratory, a students mixes 2 solutions of water. The first solution contains an acid dissolved in water and has a mass of 75g. The second solution contains a base dissolved in water and also has a mass of 75g. When the student mixes the solutions together in a foam cup calorimeter, the temperature of the resulting solution raises by 35 ∘ C . How much heat in kilojoules was released by this reaction?
Can someone show me the steps to achieve the answer, I’m so lost.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.