Concentration Mastering Chemistry
What is the molality of a solution prepared from 25.0 g NaCl and 100.0 g H2O?
4.28 m NaCl
What is the molality of a solution prepared from 5.25 g LiF and 45.0 g H2O?
4.49 m LiF
What is the molality of a solution prepared from 80.3 g I2 and 100.0 mL hexane? The density of hexane is 0.655 g/mL.
4.82 m
What is the molarity of a solution containing 2.8 moles of LiCl and a volume of 5.00 × 102 mL?
5.6 M LiCl
What is the molarity of a solution containing 1.54 moles of NaOH and a volume of 2.5 × 102 mL?
6.2 M NaOH
What is the volume/volume percent of a solution prepared from 12.3 mL ethanol in 150.0 mL water? Assume volumes are additive.
7.58% (v/v) ethanol
What is the molarity of a solution containing 6.38 moles of HCl and a volume of 1.8 L?
3.5 M HCl
What is the mole fraction of O2 in a sample with 1.25 grams CH4, 45.2 g N2, and 13.4 g O2?
.199
What is the mole fraction of O2 in a sample with 3.50 grams of O2 and 25.6 g N2?
0.107
What is the mole fraction of Ar in a sample with 12.4 grams Ar, 35.0 g N2, and 2.91 g He?
0.136
What is the molarity of a solution containing 45.3 grams of Mg(NO3)2 and a volume of 2.25 L?
0.136 M Mg(NO3)2
What is the molarity of a solution containing 110.3 grams of CaBr2 and a volume of 1.50 L?
0.368 M CaBr2
What is the molarity of a solution containing 28.6 grams of NH3 and a volume of 3.5 L?
0.48 M NH3
What is the molality of a solution prepared from 13.2 g MgCl2 and 175.0 g H2O?
0.794 m MgCl2
What is the mass percent (m/m) of a solution containing 55 grams of calcium chloride, CaCl2, and 125 grams of water?
31% (m/m) CaCl2
What is the molarity of a solution prepared from 19.4 g NaCl in 300.0 mL of solution?
1.11 M NaCl
What is the molality of a solution prepared from 12.5 g KNO3 and 75.0 g H2O?
1.65 m KNO3
What is the molarity of a solution containing 4.2 moles of NaCl and a volume of 2.3 L?
1.8 M NaCl
What is the molarity of a solution prepared from 15.0 grams KNO3 in 75.0 mL solution?
1.97 M KNO3
What is the volume/volume percent of a solution prepared from 10.0 g ethanol in 95.0 g water? The density of ethanol is 0.789 g/mL and the density of water is 1.00 g/mL.
11.8% (v/v) ethanol
What is the volume/volume percent of a solution prepared from 19.5 mL methanol in 125 mL ethanol? Assume volumes are additive.
13.5% (v/v) methanol in ethanol
What is the mass percent of a solution prepared from 20.0 g KNO3 and 125.0 g water?
13.8% (m/m) KNO3
What is the mass/volume percent of a solution prepared from 35.0 g AgNO3 in 225 g solution? The density of the solution is 1.00 g/mL.
15.6% (m/v) AgNO3
What is the mass/volume percent of a solution prepared from 19.5 g NaOH in 125 g solution? The density of the solution is 1.05 g/mL.
16.4% (m/v) NaOH
What is the mass percent of a solution prepared from 15.0 g NaCl and 75.0 g H2O?
16.7% (m/m) NaCl
What is the volume percent (v/v) of a solution containing 25 mL of isopropyl alcohol, C3H7OH, dissolved in enough water to make a 150 mL solution?
17% (v/v) C3H7OH
What is the mass percent of a solution prepared from 17.5 g MgCl2 in 85.0 g H2O?
17.1% (m/m) MgCl2
What is the mass/volume (m/v) percent of a solution containing 45 g of lithium hydroxide, LiOH, dissolved in enough water to make a 250 mL solution?
18% (m/v) LiOH
What is the molarity of a solution prepared from 85.0 g CaCl2 in 300.0 g of solution? The density of the solution is 1.05 g/mL.
2.68 M CaCl2
What is the mass/volume percent of a solution prepared from 15.0 g NaCl in 75.0 g solution? The density of the solution is 1.00 g/mL.
20.0% (m/v) NaCl
