CHM 142 EXAM ACTUAL TEST PAPER QUESTIONS CORRECT ANSWERS GRADED A PLUS
CHM 142 EXAM Latest 2026/2027 WITH Actual
Questions and Answers Verified Solutions Latest
Update
Question:
20 g 5 g 10 g 30 g.
Answer:
The solubility of solids is affected by temperature while the solubility of gases is affected by both
temperature and pressure. The Solubility of Solids The solubility of a solid solute increases with
increasing temperature because the thermal energy helps to overcome the attractions between solute
molecules in the solid. The Solubility of Gases The solubility of a gaseous solute decreases with
increasing temperature because the thermal energy helps to overcome the attractions between solute
and solvent molecules. The solubility of a gaseous solute increases as pressure of the solute gas
above the solution is increased because a higher pressure means that more gas molecules are present
near the surface of the solution and able to dissolve. How much KNO3 can dissolve in 50 g of water
at 10 °C?
Question:
CH3OH (methanol, polar) BF3 (Boron trifluoride, nonpolar) CCl4 (carbon tetrachloride, nonpolar)
C4H10 (butane, nonpolar).
Answer:
There must be a strong attraction between the solute and the solvent molecules in order for the
solute to dissolve in the solvent allowing a solution to form. Which substance will dissolve in water,
a polar substance?
Question:
8.84 g glucose/108.84 g solution 8.84 g glucose/91.16 g solution 8.84 g glucose/100 g solution 8.84
g glucose/100 g water.
Answer:
Which expression is equivalent to 8.84% (m/m) glucose?
, Question:
3.6 °C
Answer:
Question:
3.6 °C 10.1 °C
Answer:
Question:
10.1 °C.
Answer:
Colligative properties of solutions depend only on the number of particles dissolved in a solvent.
The higher the number of dissolved solute particles, the larger the effect on the boiling point,
melting point, vapor pressure, and osmotic pressure. What is the freezing point of 0.500 m I2 in
cyclohexane (normal freezing point = 6.55 °C)? Kf,cyclohexane = 20.2 °C/m
Question:
0.690 0.310 0.136 0.157.
Answer:
While not used as frequently, mole fraction is another unit of concentration. Mole fraction is the
fraction of moles of one substance over the total moles in the sample. mole fraction(x) =
molesA/total moles What is the mole fraction of Ar in a sample with 12.4 grams Ar, 35.0 g N2, and
2.91 g He?
Question:
CHM 142 EXAM Latest 2026/2027 WITH Actual
Questions and Answers Verified Solutions Latest
Update
Question:
20 g 5 g 10 g 30 g.
Answer:
The solubility of solids is affected by temperature while the solubility of gases is affected by both
temperature and pressure. The Solubility of Solids The solubility of a solid solute increases with
increasing temperature because the thermal energy helps to overcome the attractions between solute
molecules in the solid. The Solubility of Gases The solubility of a gaseous solute decreases with
increasing temperature because the thermal energy helps to overcome the attractions between solute
and solvent molecules. The solubility of a gaseous solute increases as pressure of the solute gas
above the solution is increased because a higher pressure means that more gas molecules are present
near the surface of the solution and able to dissolve. How much KNO3 can dissolve in 50 g of water
at 10 °C?
Question:
CH3OH (methanol, polar) BF3 (Boron trifluoride, nonpolar) CCl4 (carbon tetrachloride, nonpolar)
C4H10 (butane, nonpolar).
Answer:
There must be a strong attraction between the solute and the solvent molecules in order for the
solute to dissolve in the solvent allowing a solution to form. Which substance will dissolve in water,
a polar substance?
Question:
8.84 g glucose/108.84 g solution 8.84 g glucose/91.16 g solution 8.84 g glucose/100 g solution 8.84
g glucose/100 g water.
Answer:
Which expression is equivalent to 8.84% (m/m) glucose?
, Question:
3.6 °C
Answer:
Question:
3.6 °C 10.1 °C
Answer:
Question:
10.1 °C.
Answer:
Colligative properties of solutions depend only on the number of particles dissolved in a solvent.
The higher the number of dissolved solute particles, the larger the effect on the boiling point,
melting point, vapor pressure, and osmotic pressure. What is the freezing point of 0.500 m I2 in
cyclohexane (normal freezing point = 6.55 °C)? Kf,cyclohexane = 20.2 °C/m
Question:
0.690 0.310 0.136 0.157.
Answer:
While not used as frequently, mole fraction is another unit of concentration. Mole fraction is the
fraction of moles of one substance over the total moles in the sample. mole fraction(x) =
molesA/total moles What is the mole fraction of Ar in a sample with 12.4 grams Ar, 35.0 g N2, and
2.91 g He?
Question:
