1. A solution is formed by adding 35 g of ammonium nitrate to 250 g of water. What is the percent by mass of ammonium nitrate?
A. 18.56 %
B. 14. 33 %
C. 12.28%
D. 20. 77 %
2. What is the percentage by mass of a salt solution prepared by dissolving 11 grams of salt in 80 grams of solution?
A. 13.5 %
B. 13 %
C. 13.25%
D. 13.75%
3. How many grams of sodium chloride are present in a 250-gram salt solution containing 9% NaCl?
A. 21.5%
B. 20.5 %
C. 22.5 %
D. 23.5%
4. Calculate the mass percent of sodium hypochlorite in commercial bleach, if 1.00 gram of NaOCl (the active ingredients in bleach) is dissolved in 19.05 grams of solution.
A. 8.99 %
B. 5.25%
C. 6.83 %
D. 9.23 %
5. What is the percent by mass of 5.0 g of iron (II) sulfate dissolved in 75.0 solution ?
A. 9.56 %
B. 6.67 %
C. 6.45 %
D. 8.67%
Share
0 Replies