Exam 2: Chemistry

When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions?

(Multiple Choice)

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Question 81

Four different gases are all observed to have the same temperature. Which of the following conclusions is supported by this observation?

(Multiple Choice)

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Question 82

A leaf gently floats on a pond. Which of the following statements best explains why the leaf stays on top of the water?

(Multiple Choice)

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Question 83

Which of the following occurs when a rigid container of gas is heated?

(Multiple Choice)

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Question 84

Which of the following did scientists learn about the atom from Rutherford's gold foil experiment?

(Multiple Choice)

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Question 85

In a hydrogen fluoride (HF) molecule, a hydrogen atom and a fluorine atom are held together by a polar covalent bond. Which of the following best explains why this bond is polar?

(Multiple Choice)

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Question 86

When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions?

(Multiple Choice)

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Question 87

Which of the following did scientists learn about the atom from Rutherford's gold foil experiment?

(Multiple Choice)

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Question 88

Which of the following statements best explains why elements in the same family of the periodic table have similar bonding properties?

(Multiple Choice)

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Question 89

Which of the following statements applies to a nuclear fission reaction?

(Multiple Choice)

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Question 90

A student made a homogeneous mixture of water and salt. Which of the following statements applies to this homogeneous mixture?

(Multiple Choice)

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Question 91

Which of the following correctly describes a trend from top to bottom in the group 2 (2A) elements on the periodic table?

(Multiple Choice)

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Question 92

Which of the following statements explains why oxygen is classified asa pure substance and air is classifiedas a mixture?

(Multiple Choice)

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Question 93

Which of the following statements explains what happens to the gas inside a balloon as the external pressure on the balloon decreases and the temperature stays constant?

(Multiple Choice)

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Question 94

Which of the following helps explain why honey dissolves more rapidly in hot water than in cold water?

(Multiple Choice)

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Question 95

A person left a bottle of distilled water and a bottle of a sugary drink outside overnight. In the morning, one liquid was frozen but the other was not. Which liquid was frozen and why did it freeze?

(Multiple Choice)

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Question 96

Which of the following explains why saltwater is considered a mixture?

(Multiple Choice)

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Question 97

The final elements produced by radioactive decay differ from the original radioactive elements because the nuclei of the ? nal elements are always

(Multiple Choice)

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Question 98

Atoms of element A and atoms of element B react to form a compound. In the reaction, the radius of each atom of element A is decreased. Which of the following explains this decrease in atomic radius in the reaction?

(Multiple Choice)

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Question 99

Which of the following statements describes the role of a buffer?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 105

When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions?

Four different gases are all observed to have the same temperature. Which of the following conclusions is supported by this observation?

A leaf gently floats on a pond. Which of the following statements best explains why the leaf stays on top of the water?

Which of the following occurs when a rigid container of gas is heated?

Which of the following did scientists learn about the atom from Rutherford's gold foil experiment?

In a hydrogen fluoride (HF) molecule, a hydrogen atom and a fluorine atom are held together by a polar covalent bond. Which of the following best explains why this bond is polar?

When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions?

Which of the following did scientists learn about the atom from Rutherford's gold foil experiment?

Which of the following statements best explains why elements in the same family of the periodic table have similar bonding properties?

Which of the following statements applies to a nuclear fission reaction?

A student made a homogeneous mixture of water and salt. Which of the following statements applies to this homogeneous mixture?

Which of the following correctly describes a trend from top to bottom in the group 2 (2A) elements on the periodic table?

Which of the following statements explains why oxygen is classified asa pure substance and air is classifiedas a mixture?

Which of the following statements explains what happens to the gas inside a balloon as the external pressure on the balloon decreases and the temperature stays constant?

Which of the following helps explain why honey dissolves more rapidly in hot water than in cold water?

A person left a bottle of distilled water and a bottle of a sugary drink outside overnight. In the morning, one liquid was frozen but the other was not. Which liquid was frozen and why did it freeze?

Which of the following explains why saltwater is considered a mixture?

The final elements produced by radioactive decay differ from the original radioactive elements because the nuclei of the ? nal elements are always

Atoms of element A and atoms of element B react to form a compound. In the reaction, the radius of each atom of element A is decreased. Which of the following explains this decrease in atomic radius in the reaction?

Which of the following statements describes the role of a buffer?

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