Question

PLEASE HELP!! 0.25 mol of dextrose was added to 89.48 mol of water. What is the mole fraction of dextrose in the solution? Write at least 2 sig figs

Answer 1

Mole fraction of dextrose = moles of dextrose / total moles of solution

Total moles of solution = moles of dextrose + moles of water

Given, moles of dextrose = 0.25 mol

Moles of water = 89.48 mol

Total moles of solution = 0.25 mol + 89.48 mol = 89.73 mol

Mole fraction of dextrose = 0.25 mol / 89.73 mol = 0.0028

Rounding to 2 significant figures, the mole fraction of dextrose in the solution is 0.0028.