What impact could the time period (e. g., day, month, year) chosen to determine the historical average have on our understanding of SSHD?

Describe the chemical reaction based on the chemical equation below. also, explain whether the equation is balanced.

What diagram shows the ionic compound of magnesium oxide

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?