How many moles of electrons are required to produce 31.3 g of potassium metal from a sample of molten potassium chloride?

Question

How many moles of electrons are required to produce 31.3 g of potassium metal from a sample of molten potassium chloride?

The correct answer is 0.801

Answer 1

31.3 g K x 1 mol K/39.1 g = 0.801 moles K metal desired

1 mol K = 1 mole KCl = 1 mole K⁺

0.801 moles K x 1 mol K⁺/mol K = 0.801 moles K⁺

0.801 moles K⁺ x 1 mole electrons/mole K⁺ = 0.801 moles of electrons