Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

The following questions refer to the phase diagram below. -What phase should this substance exist as, at a pressure of 2000 torr and a temperature of 20°C?

(Multiple Choice)

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Question 41

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many chloride ions are present in entirety within just one sodium chloride unit cell?

(Multiple Choice)

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Question 42

Which set of properties below best describes solid ionic crystalline substances?

(Multiple Choice)

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Question 43

The critical temperature of a substance is

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Question 44

1,3,6,8-Tetramethylnaphthlene is a white crystalline solid which is very soft, has a low melting point, and is a nonconductor of electricity. Which category of substance does it most likely fit under?

(Multiple Choice)

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Question 45

The following questions refer to the basic phase diagram below with gas, liquid, and solid phases present and labeled. -Above ________ °C, it is not possible for a liquid phase of this substance to exist.

(Short Answer)

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Question 46

The following questions refer to the diagram below. -At what temperatures do the normal boiling and freezing points occur for this substance?

(Short Answer)

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Question 47

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many sodium ions are present in entirety within just one sodium chloride unit cell?

(Multiple Choice)

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Question 48

p-Xylene, C₈H₁₀, has an enthalpy of fusion of 158.3 J g^-1 and its melting point temperature is 13.2°C. How much heat is required to transform 115 g of solid p-xylene at 13.2°C into liquid p-xylene, also at 13.2°C?

(Multiple Choice)

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Question 49

Which set of properties below best describes metallic substances?

(Multiple Choice)

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Question 50

Which of the following substances has the lowest boiling point? N₂, CCl₄, CH₃Cl, Cl₂, H₂O

(Short Answer)

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Question 51

Which covalent compound will exhibit hydrogen bonding in the liquid state?

(Multiple Choice)

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Question 52

Which causes surface tension?

(Multiple Choice)

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Question 53

When a gas is below its critical temperature, application of sufficient pressure will cause the gas to become a liquid.

(True/False)

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Question 54

One of the solid forms of iron, called $\alpha$ -iron, crystallizes in a body-centered cubic lattice. If atomic planes of this form of iron are separated by 143.3 pm, at what angle would you find the first-order (n = 1)diffraction of 0.209 nm X-rays from these planes?

(Multiple Choice)

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Question 55

A solid with a molecular weight of 148.0 g/mol is already at its melting point. If 18.6 g of this solid requires 4.838 kJ of heat to melt it, what is the molar heat of fusion (in kJ/mol)?

(Multiple Choice)

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Question 56

Helium atoms do not combine to make diatomic helium molecules (He₂), but He atoms do have a weak ________ intermolecular attraction to each other.

(Short Answer)

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Question 57

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the second-order (n = 2)diffraction of 0.154 nm X-rays from a graphite crystal?

(Short Answer)

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Question 58

Crystals tend to have flat surfaces of particles that meet at angles characteristic of the substance. The particles may be

(Multiple Choice)

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Question 59

Which compound cannot be liquefied by compression, at a temperature of 25.0°C?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 189

Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

The following questions refer to the phase diagram below. -What phase should this substance exist as, at a pressure of 2000 torr and a temperature of 20°C?

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many chloride ions are present in entirety within just one sodium chloride unit cell?

Which set of properties below best describes solid ionic crystalline substances?

The critical temperature of a substance is

1,3,6,8-Tetramethylnaphthlene is a white crystalline solid which is very soft, has a low melting point, and is a nonconductor of electricity. Which category of substance does it most likely fit under?

The following questions refer to the basic phase diagram below with gas, liquid, and solid phases present and labeled. -Above ________ °C, it is not possible for a liquid phase of this substance to exist.

The following questions refer to the diagram below. -At what temperatures do the normal boiling and freezing points occur for this substance?

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many sodium ions are present in entirety within just one sodium chloride unit cell?

p-Xylene, C8H10, has an enthalpy of fusion of 158.3 J g-1 and its melting point temperature is 13.2°C. How much heat is required to transform 115 g of solid p-xylene at 13.2°C into liquid p-xylene, also at 13.2°C?

Which set of properties below best describes metallic substances?

Which of the following substances has the lowest boiling point? N2, CCl4, CH3Cl, Cl2, H2O

Which covalent compound will exhibit hydrogen bonding in the liquid state?

Which causes surface tension?

When a gas is below its critical temperature, application of sufficient pressure will cause the gas to become a liquid.

One of the solid forms of iron, called α\alphaα -iron, crystallizes in a body-centered cubic lattice. If atomic planes of this form of iron are separated by 143.3 pm, at what angle would you find the first-order (n = 1)diffraction of 0.209 nm X-rays from these planes?

A solid with a molecular weight of 148.0 g/mol is already at its melting point. If 18.6 g of this solid requires 4.838 kJ of heat to melt it, what is the molar heat of fusion (in kJ/mol)?

Helium atoms do not combine to make diatomic helium molecules (He2), but He atoms do have a weak ________ intermolecular attraction to each other.

The atomic planes in a graphite crystal are separated by 335 pm. At what angle would you find the second-order (n = 2)diffraction of 0.154 nm X-rays from a graphite crystal?

Crystals tend to have flat surfaces of particles that meet at angles characteristic of the substance. The particles may be

Which compound cannot be liquefied by compression, at a temperature of 25.0°C?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

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p-Xylene, C₈H₁₀, has an enthalpy of fusion of 158.3 J g^-1 and its melting point temperature is 13.2°C. How much heat is required to transform 115 g of solid p-xylene at 13.2°C into liquid p-xylene, also at 13.2°C?

Which of the following substances has the lowest boiling point? N₂, CCl₄, CH₃Cl, Cl₂, H₂O

One of the solid forms of iron, called $\alpha$ -iron, crystallizes in a body-centered cubic lattice. If atomic planes of this form of iron are separated by 143.3 pm, at what angle would you find the first-order (n = 1)diffraction of 0.209 nm X-rays from these planes?

Helium atoms do not combine to make diatomic helium molecules (He₂), but He atoms do have a weak ________ intermolecular attraction to each other.