Which calculation would require a mole ratio as a conversion factor?

quick answer would be appreciated! test is timed

moles of reactant to moles of product

grams of reactant to moles of product

grams of reactant to grams of a different reactant

all of the above

all of the above

Explanation:

The question refers to stoichiometry of a balanced chemical reaction. When a chemical reaction is balanced, the mole ratio of reactants and product are of utmost importance in making any kind of calculation involving the reaction.

We could determine;

I) the mass of another reactant

II) the mass / number of moles of product by just taking the mole ratio of the species involved.