CHEM 131 Chapter 5: Limiting Reactants, Solution Stoichiometry, and Aqueous Reactions

Consider the reaction $\mathrm{N_2(g) + 3H_2(g) \rightarrow 2NH_3(g)}$. The first image shows a flask containing a mixture of $\mathrm{N_2}$ and $\mathrm{H_2}$ molecules. After the reaction goes to completion, which of the following images (a, b, or c) best represents the contents of the flask? Which reactant is limiting, and which is in excess?

Given 42.5 g of Mg and 33.8 g of $\mathrm{O_2}$, what is the theoretical yield of $\mathrm{MgO}$ in grams for the reaction $2\mathrm{Mg}(s) + \mathrm{O_2}(g) \rightarrow 2\mathrm{MgO}(s)$?

Which alkali metal reacts most vigorously with water, as shown in the images of lithium, sodium, and potassium reacting with water?