Calculate the mass of magnesium oxide possible if 2.40 g Mg reacts with 10.0 g O2. Mg + O2 → MgO a. What is the limiting reagent?
b. What is the theoretical yield?
c. What is the excess reagent and by how much?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.