51) Which of the gases in the graph below has the largest molar mass at constant

Question

51) Which of the gases in the graph below has the largest molar mass at constant temperature? 51) 0 500 1500 1000 Molecular Speed 2000 2500 A) A B) B D) D E) There is not enough information to determine. 52) Determine the freezing point depression of a solution that contains 30.7 g glycerin (C3HsO3, molar 52) mass = 92.09 g mol) in 376 mL of water. Some possibly useful constants for water are K 1.86"C/m and Kb 0.512°C/m. A) 1.65°C B) 4.98 C C) 0.654°C D) 3.33°C E) 0.887°C 39) na iquid he nergyrface of t ar amunts la 53) A) surface tension. B) viscosity. C) capillary action. D) hydrogen bonding E) dipole-dipole force.

Explanation / Answer

51)

Answer

A) A

52)

Answer

A) 1.65

Explanation

No of mole of glycerin = 30.7g/92.09g/mol = 0.3334

mass of water = 376ml = 0.376kg

molality = 0.3334mol/0.376kg = 0.8867m

TF = KF × b × i

= 1.86/m × 0.8867m × 1

= 1.65

53)

Answer

A) Surface tension

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