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Exam 6: Gases, Liquids, Solids, and Intermolecular Forces

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Question 31

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The density of Xe at STP is

A) 5) 86 g/L.
B) 16.4 g/L.
C) 32.8 g/L.
D) 48.2 g/L.

E) C) and D)
F) B) and D)

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Question 32

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The kinetic-molecular theory of gases assumes which of the following?

A) There are weak but significant interactions between gas molecules.
B) The total amount of energy will change when gas molecules collide.
C) The average kinetic energy of gas molecules will increase when you lower the temperature of the gas.
D) Gas molecules move constantly and in straight lines.

E) C) and D)
F) A) and B)

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Question 33

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What is the predominant intermolecular force between HCl molecules?

The temperature at which a liquid becomes a gas is called the

At STP,22.4 liters of nitrogen gas,N₂,will have a mass of

The density of O₂ gas at STP is

The process by which a gas is converted to a liquid is called

It requires more energy to melt one mole of an ionic compound than one mole of a molecular compound.

Which state of matter is characterized by having molecules close together and confined in their movement?

The temperature at which a solid melts is the melting point of the solid.The melting point is an indication of the intermolecular forces that hold a solid together.Aluminum melts at 660°C.Gold melts at 1064°C.Lead melts at 328°C.Which one of the following ranks the intermolecular forces in these solid elements from the strongest to the weakest?

At STP,22.4 liters of krypton gas,Kr,will have a mass of

Melting is the change from the ________ state to the ________ state.

If the pressure of a gas rises,the gas molecules will strike the walls of its container more frequently. (Assume that the container has a definite shape and volume.)

Use the ideal gas law to calculate the volume occupied by 0.400 mol of nitrogen gas at 3.00 atm pressure and at 27°C.R = 0.0821 L * atm/(K*mol) .

Matter is more likely to exist in the ________ state as the temperature is lowered.

Which of the following ranks the three states of matter from most to least ordered?

Which of the following is NOT a postulate of the kinetic-molecular theory?

The phrase "like dissolves like" means that a polar substance will dissolve readily in a polar solvent.

Temperatures must be converted to the Celsius temperature scale when Charles's Law is used.

The degree of order of matter is directly proportional to the cohesive forces that hold the matter together.In other words,the more organized the state of matter,the stronger the "glue" that holds it together.Which of the following ranks these cohesive forces from the state with the strongest to that with the weakest cohesive forces?