What number should be in front of O2 to balance the equation?
4A1+_O2–> A12O3

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?

Explain what happens at the saturation point when adding salt to water at room temperature.

Convert .347 kilometers to miles show your work