What volume does 7.50 × 1020 molecules of O2 occupy at STP?

A) 22.4 L B) 1.68 × 1022 L C) 0.0279 L D) 2.79 L A) 22.4 L B) 1.68 × 1022 L C) 0.0279 L D) 2.79 L

Exam 7: Gases, Liquids, and Solids

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At rest, the volume of air in the lungs is 615 mL at 760 mm Hg. When the volume of the lungs expands during inhalation, what happens to the pressure inside the lungs?

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Question 61

London dispersion forces are exhibited by all covalent compounds.

(True/False)

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Question 62

A scuba diver typically begins a dive with a compressed air tank at 2, 350 psi. What is this pressure expressed in units of Pa?

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Question 63

Which molecule(s)exhibit hydrogen bonding?

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Question 64

Gases expand to fill the volume and shape of their container because the rapidly moving particles experience negligible attractive forces for each other.

(True/False)

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Question 65

Freeze-drying removes water from foods by the process of sublimation.

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Question 66

Which cylinder at STP will contain the greatest number of gas particles?

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Question 67

Which gas law describes the relationship between the volume and temperature of a sample of gas at constant pressure?

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Question 68

A weather balloon contains 233 L of helium at 22 °C and 760. mm Hg. What is the volume of the balloon when it ascends to an altitude where the temperature is -54 °C and 511 mm Hg?

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Question 69

A birthday balloon contains helium at a pressure of 815 torr. What is this pressure expressed in units of mm Hg?

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Question 70

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose, what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H₂O₂(l) $\rightarrow$ 2 H₂O(l)+ O₂(g)

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Question 71

Three of the four phase changes below are endothermic. Which phase change is NOT endothermic?

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Question 72

The stronger the intermolecular forces, the lower the vapor pressure of a substance at a given temperature.

(True/False)

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Question 73

All solids are crystalline solids.

(True/False)

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Question 74

The pressure of a gas is proportional to its Kelvin temperature at constant volume and number of moles. Therefore increasing the temperature increases the pressure.

(True/False)

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Question 75

Energy is released when a less organized state is converted to a more organized state.

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Question 76

What volume does 7.50 × 10²⁰ molecules of O₂ occupy at STP?

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Question 77

Gas pressure is the result of particles of gas colliding with each other.

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Question 78

A scuba diver typically begins a dive with a compressed air tank at 2, 350 psi. What is this pressure expressed in units of atmospheres?

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Question 79

Showing 61 - 79 of 79

Exam 7: Gases, Liquids, and Solids

At rest, the volume of air in the lungs is 615 mL at 760 mm Hg. When the volume of the lungs expands during inhalation, what happens to the pressure inside the lungs?

London dispersion forces are exhibited by all covalent compounds.

A scuba diver typically begins a dive with a compressed air tank at 2, 350 psi. What is this pressure expressed in units of Pa?

Which molecule(s)exhibit hydrogen bonding?

Gases expand to fill the volume and shape of their container because the rapidly moving particles experience negligible attractive forces for each other.

Freeze-drying removes water from foods by the process of sublimation.

Which cylinder at STP will contain the greatest number of gas particles?

Which gas law describes the relationship between the volume and temperature of a sample of gas at constant pressure?

A weather balloon contains 233 L of helium at 22 °C and 760. mm Hg. What is the volume of the balloon when it ascends to an altitude where the temperature is -54 °C and 511 mm Hg?

A birthday balloon contains helium at a pressure of 815 torr. What is this pressure expressed in units of mm Hg?

Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose, what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H2O2(l) →\rightarrow→ 2 H2O(l)+ O2(g)

Three of the four phase changes below are endothermic. Which phase change is NOT endothermic?

The stronger the intermolecular forces, the lower the vapor pressure of a substance at a given temperature.

All solids are crystalline solids.

The pressure of a gas is proportional to its Kelvin temperature at constant volume and number of moles. Therefore increasing the temperature increases the pressure.

Energy is released when a less organized state is converted to a more organized state.

What volume does 7.50 × 1020 molecules of O2 occupy at STP?

Gas pressure is the result of particles of gas colliding with each other.

A scuba diver typically begins a dive with a compressed air tank at 2, 350 psi. What is this pressure expressed in units of atmospheres?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes, Reaction Rates, and Equilibrium

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen, Halogen, or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids, Esters, and Amides

Amines and Neurotransmitters

Lipids

Carbohydrates

Amino Acids, Proteins, and Enzymes

Nucleic Acids and Protein Synthesis

Digestion and the Conversion of Food Into Energy

Carbohydrate, Lipid, and Protein Metabolism

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Hydrogen peroxide decomposes to give water and oxygen gas according to the equation below. If 3.0 moles of hydrogen peroxide decompose, what volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C? 2 H₂O₂(l) $\rightarrow$ 2 H₂O(l)+ O₂(g)

What volume does 7.50 × 10²⁰ molecules of O₂ occupy at STP?