•How
many grams of solute are needed to prepare:
•A.
2.50 x 102 g of 5.00% (W/W) NH4Cl
•B.
2.50 x 102 mL of 3.50% (W/V) Na2CO3
•
•Calc
the amount of water that must be added to 5.00 g of urea (NH2)2CO in the preparation of a 16.2 W/W % by mass
solution.