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) 5.30 g of urea (NH2)2CO in the preparation of a 20.9 percent by mass solution:
(b) 34.5 g of MgCl2 in the preparation of a 3.2 percent mass solution:
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Mass Percent concept. You can view video lessons to learn Mass Percent. Or if you need more Mass Percent practice, you can also practice Mass Percent practice problems.