What is the mole fraction of KCl in a solution containing 5.00 moles of KCl and 75.0 moles of H2O

Question

What is the mole fraction of KCl in a solution containing 5.00 moles of KCl and 75.0 moles of H2O

Answer 1

mole fraction of KCl = moles of KCl / Total moles of solution

Total moles of solution = moles of KCl + moles of H₂O = 5.00 + 75.0 = 80.0 moles solution

mole fraction of KCl = 5.00 / 80.0 = 0.0625