% w/w = (grams solute/g solution)*100
% = [grams solute/(g solute + g solvent)]
% = [5 g urea/5 g urea + g solvent)]*100 = 16.2
calculate the amount of water in grams that must be added to 5.00 grams of urea (NH2)2 CO in the preparation of a 16.2 percent by mass, and 26.2 grams of MgCl2 in the preparation of a 1.5 percent by mass solution.
2 answers
25.86g