Exam 2: Chemistry

When stirred in 30°C water, 5 g of powdered potassium bromide, KBr, dissolves faster than 5 g of large crystals of potassium bromide. Which of the following best explains why the powdered KBr dissolves faster?

(Multiple Choice)

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Question 41

Which of the following is the same for both hydrogen and potassium?

(Multiple Choice)

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Question 42

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 43

One way that mixtures differ from pure substances is in the methods that can be used to separate them into their components.Which of the following is a method used to separate the components of some mixtures?

(Multiple Choice)

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Question 44

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

(Multiple Choice)

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Question 45

Which of the following samples of sugar will dissolve fastest in a pitcher of lemonade?

(Multiple Choice)

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Question 46

Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?

(Multiple Choice)

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Question 47

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

(Multiple Choice)

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Question 48

Which of the following correctly pairs a phase of matter with its description?

(Multiple Choice)

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Question 49

Which of the following characteristics allows blood to resist changes in pH?

(Multiple Choice)

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Question 50

Which of the following statements explains how a buffer maintains pH when small amounts of a strong base are added?

(Multiple Choice)

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Question 51

The pH of four different solutions of common materials is measured. Which of the following lists the solutions in order from most acidic to most basic?

(Multiple Choice)

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Question 52

Which of the following correctly describes molecules of two different gases if they are at the same temperature and pressure?

(Multiple Choice)

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Question 53

Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?

(Multiple Choice)

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Question 54

Which of the following is an example of nuclear fusion?

(Multiple Choice)

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Question 55

Which of the following observed properties is most reliable in classifying a substance as a metal?

(Multiple Choice)

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Question 56

Which of the following statements describes the elements in family 16 of the periodic table?

(Multiple Choice)

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Question 57

Which of the following statements explains why elements of the alkali metal family are highly reactive?

(Multiple Choice)

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Question 58

Which of the following pieces of evidence best supports Bohr's idea that electrons occupy specific energy levels within an atom?

(Multiple Choice)

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Question 59

Which of the following sections of the periodic table contains only metals?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 105

When stirred in 30°C water, 5 g of powdered potassium bromide, KBr, dissolves faster than 5 g of large crystals of potassium bromide. Which of the following best explains why the powdered KBr dissolves faster?

Which of the following is the same for both hydrogen and potassium?

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

One way that mixtures differ from pure substances is in the methods that can be used to separate them into their components.Which of the following is a method used to separate the components of some mixtures?

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

Which of the following samples of sugar will dissolve fastest in a pitcher of lemonade?

Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?

Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?

Which of the following correctly pairs a phase of matter with its description?

Which of the following characteristics allows blood to resist changes in pH?

Which of the following statements explains how a buffer maintains pH when small amounts of a strong base are added?

The pH of four different solutions of common materials is measured. Which of the following lists the solutions in order from most acidic to most basic?

Which of the following correctly describes molecules of two different gases if they are at the same temperature and pressure?

Which of the following statements best explains why potassium (K) reacts easily with bromine (Br)?

Which of the following is an example of nuclear fusion?

Which of the following observed properties is most reliable in classifying a substance as a metal?

Which of the following statements describes the elements in family 16 of the periodic table?

Which of the following statements explains why elements of the alkali metal family are highly reactive?

Which of the following pieces of evidence best supports Bohr's idea that electrons occupy specific energy levels within an atom?

Which of the following sections of the periodic table contains only metals?

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