For the reaction: C(s) + 2H2(g) → CH4(g), how many moles of H2 are required to produce 10.0 moles of CH4?

What diagram shows the ionic compound of magnesium oxide

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

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?