Of the following compounds containing 1H, 12C, and 16O, the one with the greatest number of molecules in a sample with a mass of 2 grams would be

A) CO. B) CO2. C) HCOOH. D) C2H5OH. E) C6H12O6. A) CO. B) CO2. C) HCOOH. D) C2H5OH. E) C6H12O6.

Exam 2: Small Molecules and the Chemistry of Life

Rank the following solutions in order from the most acidic to the most basic: lemon juice, pH = 2; Mylanta, pH = 10; Sprite, pH = 3; drain cleaner, pH = 15; seawater, pH = 8. Of the preceding, which has the highest concentration of H⁺ ions? Which has the lowest concentration of H⁺ ions?

(Essay)

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Question 81

Which of the following statements about chemical reactions is true?

(Multiple Choice)

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Question 82

Cola has a pH of 3; blood plasma has a pH of 7. The hydrogen ion concentration of cola is _______ than the hydrogen ion concentration of blood plasma.

(Multiple Choice)

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Question 83

Which of the following correctly states an unusual property of water?

(Multiple Choice)

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Question 84

The mass number of an atom is determined primarily by the _______ it contains.

(Multiple Choice)

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Question 85

You have discovered that a molecule is hydrophilic. What else do you know about this molecule?

(Multiple Choice)

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Question 86

Molecules that have an unequal distribution of electric charge are called _______ molecules.

(Short Answer)

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Question 87

Of the following compounds containing ¹H, ¹²C, and ¹⁶O, the one with the greatest number of molecules in a sample with a mass of 2 grams would be

(Multiple Choice)

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Question 88

Which of the following statements about chemical reactions is false?

(Multiple Choice)

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Question 89

Water is essential to life. Which of the following physical properties of water affect(s) life in some beneficial way?

(Multiple Choice)

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Question 90

Sweating is a useful cooling device for humans because water

(Multiple Choice)

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Question 91

When sodium hydroxide (NaOH) is added to water, it ionizes, releasing OH^- and Na⁺ ions. The resulting solution is

(Multiple Choice)

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Question 92

The molecular weight of acetic acid is 60. How many grams of acetic acid would be required to prepare 10 ml of a 0.001 M (1.0 mM) solution?

(Multiple Choice)

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Question 93

Which of the following statements about covalent bonds is not true?

(Multiple Choice)

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Question 94

The reaction HCl $\to$ H⁺ + Cl^- in the human stomach is an example of the

(Multiple Choice)

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Question 95

Two characteristics of water make it different from most other compounds: Its solid state is _ its liquid state and it takes up _ heat to change to its gaseous state.

(Multiple Choice)

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Question 96

The water strider skates along the surface of water due to a property of liquids called _______.

(Short Answer)

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Question 97

The chemical properties of an element are determined by the number of _______ its atoms contain.

(Short Answer)

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Question 98

Why is the atomic weight of hydrogen 1.008 and not exactly its mass number, 1.000?

(Multiple Choice)

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Question 99

Solid salt, NaCl, is neutral. When dissolved in water, NaCl

(Multiple Choice)

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Question 100

Showing 81 - 100 of 145

Exam 2: Small Molecules and the Chemistry of Life

Rank the following solutions in order from the most acidic to the most basic: lemon juice, pH = 2; Mylanta, pH = 10; Sprite, pH = 3; drain cleaner, pH = 15; seawater, pH = 8. Of the preceding, which has the highest concentration of H+ ions? Which has the lowest concentration of H+ ions?

Which of the following statements about chemical reactions is true?

Cola has a pH of 3; blood plasma has a pH of 7. The hydrogen ion concentration of cola is _______ than the hydrogen ion concentration of blood plasma.

Which of the following correctly states an unusual property of water?

The mass number of an atom is determined primarily by the _______ it contains.

You have discovered that a molecule is hydrophilic. What else do you know about this molecule?

Molecules that have an unequal distribution of electric charge are called _______ molecules.

Of the following compounds containing 1H, 12C, and 16O, the one with the greatest number of molecules in a sample with a mass of 2 grams would be

Which of the following statements about chemical reactions is false?

Water is essential to life. Which of the following physical properties of water affect(s) life in some beneficial way?

Sweating is a useful cooling device for humans because water

When sodium hydroxide (NaOH) is added to water, it ionizes, releasing OH- and Na+ ions. The resulting solution is

The molecular weight of acetic acid is 60. How many grams of acetic acid would be required to prepare 10 ml of a 0.001 M (1.0 mM) solution?

Which of the following statements about covalent bonds is not true?

The reaction HCl →\to→ H+ + Cl- in the human stomach is an example of the

Two characteristics of water make it different from most other compounds: Its solid state is _______ its liquid state and it takes up _______ heat to change to its gaseous state.

The water strider skates along the surface of water due to a property of liquids called _______.

The chemical properties of an element are determined by the number of _______ its atoms contain.

Why is the atomic weight of hydrogen 1.008 and not exactly its mass number, 1.000?

Solid salt, NaCl, is neutral. When dissolved in water, NaCl

Studying Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

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Photosynthesis: Energy From Sunlight

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The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

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Rank the following solutions in order from the most acidic to the most basic: lemon juice, pH = 2; Mylanta, pH = 10; Sprite, pH = 3; drain cleaner, pH = 15; seawater, pH = 8. Of the preceding, which has the highest concentration of H⁺ ions? Which has the lowest concentration of H⁺ ions?

Of the following compounds containing ¹H, ¹²C, and ¹⁶O, the one with the greatest number of molecules in a sample with a mass of 2 grams would be

When sodium hydroxide (NaOH) is added to water, it ionizes, releasing OH^- and Na⁺ ions. The resulting solution is

The reaction HCl $\to$ H⁺ + Cl^- in the human stomach is an example of the

Two characteristics of water make it different from most other compounds: Its solid state is _ its liquid state and it takes up _ heat to change to its gaseous state.