Be sure to answer all parts.
Calculate the amount of water (in grams) that must be added to each of the following substances to produce the indicated solution.
(a) 5.70 g of urea (NH2)2 CO in the preparation of a 24.8 percent by mass solution:
(b) 33.1 g of MgCl2 in the preparation of a 4.9 percent mass solution:
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