Test Bank all Chapter, Correct Answer

Chemistry Principles and Reactions 7e William Masterton Cecile Hurley Edward Neth

(Test Bank all Chapter, Correct Answer marked with *)

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Chapter 1

• An element is a substance that

*a. cannot be decomposed into two or more pure substances.

• is composed of two or more different substances.
• is a gas at room temperature.
• can be separated into two or more pure substances by distillation.
• can be separated into two or more substances by chromatography.

• All of the following stat ements are true EXCEPT

• of the 115 known elements, 91 occur naturally.
• an element cannot be broken down into two or more pure substances.
• a compound is a substance that contains two or more elements.
• a pure compound always contains the same elements in the same mass

percentages.*e. another name for a heterogeneous mixture is a solution.

• All of the following statements concerning water (H

2

• are false EXCEPT

*a. the percentage of oxygen in H 2 O is independent of where the sample is obtained.

• H

2 O is a heterogeneous mixture.

• H

2 O is a homogeneous mixture.

• H

2 O is an element.

• H

2 O has properties similar to those of the elements hydrogen and oxygen.

• Which of the following may be used to separate water into hydrogen and

oxygen?

• filtration

*b. electrolysis

• distillation
• chromatography
• freezing

• Which of the following is/are likely to form a homogeneous mixture?
• milk and ice cream blended together with

chocolate syrup

• an egg combined with milk and mixed with a

whisk

• 1 gram table salt combined with 250 mL of water

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• 1 only
• 2 only

*c. 3 only

• 1 and 2
• 1, 2, and 3

• Which one of the following is most likely to be a heterogeneous mixture?

• vinegar (a mixture of acetic acid and water)

*b. blood

• antifreeze (a mixture of water and ethylene glycol)
• sodium chloride (table salt) dissolved in water
• the air trapped inside a car tire

• Which term best describes liquid mercury at room temperature?

• gas

*b. element

• compound
• homogeneous mixture
• heterogeneous mixture

• Which term best describes rocks, such as granite or marble?

• element
• compound
• distillation
• homogeneous mixture

*e. heterogeneous mixture

• All of the following statements are false EXCEPT

• tin (Sn) is a homogeneous mixture of sulfur (S) and nitrogen (N).
• table salt is a homogeneous mixture of sodium metal and chlorine

gas.*c. the air trapped in a bicycle tire is a homogeneous mixture.

• sugar dissolves completely in water to give a heterogeneous

mixture.

• water (H

2

• is a homogeneous mixture containing hydrogen and

oxygen.

• Which of the following statements concerning water, H

2 O, is/are true?

• H

2 O is a chemical compound.

• H

2 O is a homogeneous mixture of hydrogen and oxygen.

• The percentage of hydrogen in H

2 O is independent of where the water is obtained. 3 / 4

• 1 only
• 2 only
• 3 only

*d. 1 and 3

• 1, 2, and 3

• Sugar is a compound that dissolves readily in water. Which method is

best for separating a mixture of sugar and water?

*a. distillation

• light absorption
• electrolysis
• gas-liquid chromatography
• filtration

• Which method is best for removing the pulp from orange juice?

• distillation
• light absorption
• electrolysis
• gas-liquid chromatography

*e. filtration

• Which one of the following substances is classified as a chemical

compound?

• He
• S

8

• Na

*d. NO

• N

2

• Which of the following is the smallest mass?

• 1.5  10

8 pg

• 1.5  10

6 ng

• 1.5  10

3 g

• 1.5  10

–1 mg *e. 1.5  10 –5 g

• Which of the following is the largest volume?

• 5.0  10

2 cm 3

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