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27. What is the molality of a solution of 50.1 g of propanol (CH,CH,CH,OH) in 152 mL water, if the density of water is 1.00 g/mL? A. В. С. D. 5.48 m 0.00548 m 0.182 m 0.834 m

27. What is the molality of a solution of 50.1 g of propanol (CH,CH,CH,OH) in 152 mL water, if the density of water is 1.00 g/mL? A. В. С. D. 5.48 m 0.00548 m 0.182 m 0.834 m

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What is the molality of a solution of 50.1 g of propanol (CH,CH,CH,OH) in 152 mL water, if the density of water is 1.00 g/mL? 5.48 m 0.00548 m А. В. С. 0.182 m 0.834 m D. 28. A 3.140 molal solution of NaCl is prepared. How many grams of NaCI are present in a sample containing 2.196 kg of water? 689.5 g 118.0 g 244.4 g 403.0 g А. В. С. D. 29. How many molecules of sucrose (table sugar), C12H½01, dissolved in 450.0 g of water are needed to make a 1.40 m solution? А. 3.79 x 10 molecules 6.30 x 102 molecules В. С. 1.87 x 102 molecules D. 2.11 x 1025 molecules A 20.0-g sample of methyl alcohol (CH,OH, molar mass = 32.04 g/mol) 30. was dissolved in 33.5 g of water. The mole fraction of CH,OH is: А. 0.33 В. 0.62 С. 0.25 0.37 D. 31. If 2.00 g of helium gas and 3.62 g of oxygen gas are mixed together, what is the mole fraction of helium in the solution? А. 0.35 0.18 В. С. 0.82 D. 0.11 32. Gases generally have A. low density high density С. В. closely packed particles D. no increase in volume when temperature is increased 33. Pressure is defined as the mass that an object exerts when at rest measured in Newtons А. В. С. defined as the number of moles of substance divided by the mass of the substance D. defined as the force per unit area
Transcribed Image Text:What is the molality of a solution of 50.1 g of propanol (CH,CH,CH,OH) in 152 mL water, if the density of water is 1.00 g/mL? 5.48 m 0.00548 m А. В. С. 0.182 m 0.834 m D. 28. A 3.140 molal solution of NaCl is prepared. How many grams of NaCI are present in a sample containing 2.196 kg of water? 689.5 g 118.0 g 244.4 g 403.0 g А. В. С. D. 29. How many molecules of sucrose (table sugar), C12H½01, dissolved in 450.0 g of water are needed to make a 1.40 m solution? А. 3.79 x 10 molecules 6.30 x 102 molecules В. С. 1.87 x 102 molecules D. 2.11 x 1025 molecules A 20.0-g sample of methyl alcohol (CH,OH, molar mass = 32.04 g/mol) 30. was dissolved in 33.5 g of water. The mole fraction of CH,OH is: А. 0.33 В. 0.62 С. 0.25 0.37 D. 31. If 2.00 g of helium gas and 3.62 g of oxygen gas are mixed together, what is the mole fraction of helium in the solution? А. 0.35 0.18 В. С. 0.82 D. 0.11 32. Gases generally have A. low density high density С. В. closely packed particles D. no increase in volume when temperature is increased 33. Pressure is defined as the mass that an object exerts when at rest measured in Newtons А. В. С. defined as the number of moles of substance divided by the mass of the substance D. defined as the force per unit area
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