Textbook Problem

Consider the equation 3A + B ⟶ C + D. You react 4 moles of A with 2 moles of B. Which of the following is true?

a. The limiting reactant is the one with the higher molar mass.

b. A is the limiting reactant because you need 6 moles of A and have 4 moles.

c. B is the limiting reactant because you have fewer moles of B than A.

d. B is the limiting reactant because three A molecules react with each B molecule.

e. Neither reactant is limiting.

Justify your choice. For those you did not choose, explain why they are incorrect.