1. The solubility of a substance in 100g water is 50g at 25oC. 55 g of the substance is dissolved in water at 40oC and cooled to 25oC, no crystals appear. The solution is
A. supersaturated
B. saturated
C. unsaturated
2. In a mixture of 25.0g CaCl2, 40.0g LiCl, and 300 g of water , the mole percent of water is:
A. 93
B. 5.3
C. 1.3
3. In the reaction: NiCl2(aq) + 2NaOH(aq) -> Ni(OH)2(s) + 2NaCl(aq) ; How many mililiters of a 0.200M NaOH solution are needed to react with 18.0 ml of a 0.500M NiCl2 solution?
A. 90
B. 0.090
C. 45
D. 180
4. Shells consisting of CaCO3 can be found in deep waters
True
False
5. In the summer, fish in a pond will tend to be found at lower depths in the water
True
False
6. How many grams of KCl are needed to prepare 300.0 mL of a 0.14 M KCl solution?
A. 75
B. 3.1
C. 4.2
1. The solubility of a substance in 100g water is 50g at 25oC. 55 g of the substance is dissolved in water at 40oC and cooled to 25oC, no crystals appear. The solution is
A. supersaturated
B. saturated
C. unsaturated
2. In a mixture of 25.0g CaCl2, 40.0g LiCl, and 300 g of water , the mole percent of water is:
A. 93
B. 5.3
C. 1.3
3. In the reaction: NiCl2(aq) + 2NaOH(aq) -> Ni(OH)2(s) + 2NaCl(aq) ; How many mililiters of a 0.200M NaOH solution are needed to react with 18.0 ml of a 0.500M NiCl2 solution?
A. 90
B. 0.090
C. 45
D. 180
4. Shells consisting of CaCO3 can be found in deep waters
True
False
5. In the summer, fish in a pond will tend to be found at lower depths in the water
True
False
6. How many grams of KCl are needed to prepare 300.0 mL of a 0.14 M KCl solution?
A. 75
B. 3.1
C. 4.2
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