What is the number of moles from this chemical equation below?

Question

2NaOH(aq) + CaBr2(aq) ==> Ca(OH)2 + 2NaBr(aq)

Answer 1

2 moles NaOH

1 mol CaBr2

1 mol Ca(OH)2

2 moles NaBr

______________

6 moles total

3 moles of reactants

3 moles of products

Answer 2

you can tell based on the stoichiometric coefficients in the in the balanced equation, which tell you the number of moles of each substance involved in the reaction

in this case the values tell us that

2 moles of NaOH react with 1 mole of CaBr2 to produce

1 mole of Ca(OH)2 and 2 moles of NaBr