Can y’all help me pls:)

Consider the following reactions. (note: (s) = solid, (l) = liquid, and (g) = gas.) mg(s) + ½o2(g) → mgo(s) + 146 kcal/mole h2(g) + ½o2(g) → h2o(g), δh = -57.82 kcal/mole what type of reaction is represented by the previous two examples?

How does the motion of particles in a gas change as the gas cools

How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate