need help with chemistry

Question

In the balanced chemical equation below, how many moles of sodium fluoride are needed to produce 80.7 moles of calcium fluoride?

CaSO4 + 2NaF —> Na2SO4 + CaF2

Answer 1

CaSO₄ + 2NaF ==> Na₂SO₄ + CaF₂ ... balanced equation

Use dimensional analysis and stoichiometry:

80.7 moles CaF2 x 2 mol NaF / 1 mol CaF2 = 161.4 moles NaF = 161 moles NaF (3 sig. figsd)