Question 1

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

Accepted Answer

A)  269.01860 cm
B)  269.0186 cm
C)  269.019 cm
D)  269.02 cm
E)  269.0 cmF) B) and C)
G) A) and E)

Question 2

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in kelvin.

Accepted Answer

A) True 
 B)False

Question 3

A dictionary has the following definition for a word: "A tentative explanation that accounts for a set of facts." Which of the following words best fits that definition?

Accepted Answer

A)  Theory
B)  Hypothesis
C)  Law
D)  Experiment
E)  DefinitionF) A) and B)
G) C) and D)

Question 4

A scientist made careful measurements of the pressure and temperature of many different gases. Based on these measurements, he concluded that "the pressure of a fixed amount of gas, measured at constant volume, is directly proportional to its absolute temperature." This statement is best described as a

Accepted Answer

A)  theory.
B)  hypothesis.
C)  law.
D)  experiment.
E)  definition.F) A) and B)
G) A) and C)

Question 5

Which one of the following numbers contains a digit or digits which is/are not significant?

Accepted Answer

A)  970.0
B)  502
C)  0.300
D)  0.0043
E)  20.01F) A) and B)
G) A) and C)

Question 6

The difference between a student's experimental measurement of the density of sodium chloride and the known density of this compound reflects the __________ of the student's result.

Accepted Answer

A)  accuracy
B)  precision
C)  random error
D)  systematic error
E)  indeterminate errorF) C) and D)
G) All of the above

Question 7

Water vapor is less dense than ice because

Accepted Answer

A)  molecules in the gas phase are in constant motion.
B)  molecules in the gas phase have more potential energy than in solids.
C)  molecules in the gas phase have more kinetic energy than in solids.
D)  gaseous molecules have less mass.
E)  molecules in the gas phase have more space between them than in solids.F) A) and B)
G) C) and E)

Question 8

Which of the following correctly expresses 52,030.2 m in scientific notation?

Accepted Answer

A)  5.20302 × 10 4 m
B)  5.20302 × 10 5 m
C)  5.203 × 10 4 m
D)  5.20 × 10 4 m
E)  5.2 × 10 4 mF) A) and E)
G) B) and E)

Question 9

The result of (3.8621 × 1.5630)  − 5.98 is properly written as

Accepted Answer

A)  0.06.
B)  0.056.
C)  0.0565.
D)  0.05646.
E)  0.056462.F) None of the above
G) A) and E)

Question 10

The appropriate number of significant figures in the result of 15.234 − 15.208 is

Accepted Answer

A)  1.
B)  2.
C)  3.
D)  4.
E)  5.F) D) and E)
G) B) and D)

Question 11

Select the best statement.

Accepted Answer

A)  Chemical changes provide the only valid basis for identification of a substance.
B)  Chemical changes are easily reversed by altering the temperature of the system.
C)  Chemical changes always produce substances different from the starting materials.
D)  Chemical changes are associated primarily with extensive properties.
E)  Chemical changes are accompanied by changes in the total mass of the substances involved.F) A) and B)
G) A) and C)

Question 12

Which of the following is not an SI base unit?

Accepted Answer

A)  Meter
B)  Ampere
C)  Second
D)  Gram
E)  KelvinF) A) and B)
G) C) and E)

Question 13

When applying the scientific method, a model or theory should be based on experimental data.

Accepted Answer

A) True 
 B)False

Question 14

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers.

Accepted Answer

A)  6.1 × 10 5 km
B)  5.3 × 10 5 km
C)  3.9 × l0 5 km
D)  1.5 × 10 5 km
E)  9.4 × 10 4 kmF) D) and E)
G) B) and E)

Question 15

Which of the following correctly shows how to convert a density of 20.1 g cm−3 to units of kg m−3?

Accepted Answer

A)   −3 to units of kg m−3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   −3 to units of kg m−3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   −3 to units of kg m−3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   −3 to units of kg m−3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   −3 to units of kg m−3? 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) None of the above
G) C) and D)

Question 16

Select the best statement.

Accepted Answer

A)  Physical changes may be reversed by changing the temperature.
B)  Physical changes alter the composition of the substances involved.
C)  Physical properties are not valid characteristics for identifying a substance.
D)  Physical properties are mostly extensive in nature.
E)  Physical changes are usually accompanied by chemical changes.F) A) and C)
G) A) and B)

Question 17

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Accepted Answer

A)  38 cm
B)  24 cm
C)  18 cm
D)  9.3 cm
E)  5.9 cmF) B) and C)
G) All of the above

Question 18

You prepare 1000. mL of tea and transfer it to a 1.00-quart pitcher for storage. Which of the following statements is true?

Accepted Answer

A)  The pitcher will be filled to 100% of its capacity with no tea spilled.
B)  The pitcher will be filled to about 95% of its capacity.
C)  The pitcher will be filled to about 50% of its capacity.
D)  The pitcher will be completely filled and a small amount of tea will overflow.
E)  The pitcher will be completely filled and most of the tea will overflow.F) B) and E)
G) A) and E)

Question 19

Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of 4.77 g/cm3, 4.67 g/cm3, 4.69 g/cm3, and 4.81 g/cm3. Independent studies found the correct density to be 4.75 g/cm3. Which of the following statements represents the best analysis of the data?

Accepted Answer

A)  Bud's results have much greater accuracy than precision.
B)  Bud's results have much greater precision than accuracy.
C)  Bud's results have high accuracy and high precision.
D)  Bud's results have low accuracy and low precision.
E)  Bud's equipment is faulty.F) C) and D)
G) C) and E)

Question 20

Which of the following abbreviations of the given SI base unit is incorrect?

Accepted Answer

A)  second: s
B)  kilogram: kg
C)  kelvin: K
D)  mole: m
E)  ampere: AF) A) and D)
G) B) and D)

Exam 1: Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

Which one of the following numbers contains a digit or digits which is/are not significant?

Correct Answer
verified

Which of the following abbreviations of the given SI base unit is incorrect?

Correct Answer
verified

The appropriate number of significant figures in the result of 15.234 − 15.208 is

Correct Answer
verified

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers.

Correct Answer
verified

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct Answer
verified

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct Answer
verified

The result of (3.8621 × 1.5630) − 5.98 is properly written as

Correct Answer
verified

Which of the following is not an SI base unit?

Correct Answer
verified

Select the best statement.

Correct Answer
verified

Water vapor is less dense than ice because

Correct Answer
verified

Select the best statement.

Correct Answer
verified

Which of the following correctly shows how to convert a density of 20.1 g cm⁻³ to units of kg m⁻³?

Correct Answer
verified

The difference between a student's experimental measurement of the density of sodium chloride and the known density of this compound reflects the __________ of the student's result.

Correct Answer
verified

You prepare 1000. mL of tea and transfer it to a 1.00-quart pitcher for storage. Which of the following statements is true?

Correct Answer
verified

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in kelvin.

Correct Answer
verified

Correct Answer
verified

When applying the scientific method, a model or theory should be based on experimental data.

Correct Answer
verified

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

Correct Answer
verified

Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of 4.77 g/cm³, 4.67 g/cm³, 4.69 g/cm³, and 4.81 g/cm³. Independent studies found the correct density to be 4.75 g/cm³. Which of the following statements represents the best analysis of the data?

Correct Answer
verified

A dictionary has the following definition for a word: "A tentative explanation that accounts for a set of facts." Which of the following words best fits that definition?

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry: Definitions, Units, and Problem Solving

Which one of the following numbers contains a digit or digits which is/are not significant?

Correct AnswerverifiedShow Answer

Which of the following abbreviations of the given SI base unit is incorrect?

Correct AnswerverifiedShow Answer

The appropriate number of significant figures in the result of 15.234 − 15.208 is

Correct AnswerverifiedShow Answer

The average distance between the Earth and the Moon is 240,000 miles. Express this distance in kilometers.

Correct AnswerverifiedShow Answer

A large pizza has a diameter of 15 inches. Express this diameter in centimeters.

Correct AnswerverifiedShow Answer

Which of the following correctly expresses 52,030.2 m in scientific notation?

Correct AnswerverifiedShow Answer

The result of (3.8621 × 1.5630) − 5.98 is properly written as

Correct AnswerverifiedShow Answer

Which of the following is not an SI base unit?

Correct AnswerverifiedShow Answer

Select the best statement.

Correct AnswerverifiedShow Answer

Water vapor is less dense than ice because

Correct AnswerverifiedShow Answer

Select the best statement.

Correct AnswerverifiedShow Answer

Which of the following correctly shows how to convert a density of 20.1 g cm−3 to units of kg m−3?

Correct AnswerverifiedShow Answer

The difference between a student's experimental measurement of the density of sodium chloride and the known density of this compound reflects the __________ of the student's result.

Correct AnswerverifiedShow Answer

You prepare 1000. mL of tea and transfer it to a 1.00-quart pitcher for storage. Which of the following statements is true?

Correct AnswerverifiedShow Answer

The numerical value of any temperature expressed in Celsius is always different from the numerical value of the same temperature in kelvin.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

When applying the scientific method, a model or theory should be based on experimental data.

Correct AnswerverifiedShow Answer

Select the answer with the correct number of decimal places for the following sum: 13.914 cm + 243.1 cm + 12.00460 cm =

Correct AnswerverifiedShow Answer

Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of 4.77 g/cm3, 4.67 g/cm3, 4.69 g/cm3, and 4.81 g/cm3. Independent studies found the correct density to be 4.75 g/cm3. Which of the following statements represents the best analysis of the data?

Correct AnswerverifiedShow Answer

A dictionary has the following definition for a word: "A tentative explanation that accounts for a set of facts." Which of the following words best fits that definition?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Which of the following correctly shows how to convert a density of 20.1 g cm⁻³ to units of kg m⁻³?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Bud N. Chemist must determine the density of a mineral sample. His four trials yield densities of 4.77 g/cm³, 4.67 g/cm³, 4.69 g/cm³, and 4.81 g/cm³. Independent studies found the correct density to be 4.75 g/cm³. Which of the following statements represents the best analysis of the data?

Correct Answer
verified

Correct Answer
verified