How many moles of O2 are needed to completely react with exactly 4.3 moles of Fe

When the water vapor cools it condenses select a number that represents his process on the

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?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer