Question 1

Which of the following is a chemical change?

Accepted Answer

A)   boiling of water
B)   melting wax
C)   broiling a steak on a grill
D)   condensing water vapor into rainfall
E)   carving a piece of woodF) A) and C)
G) B) and C)

Question 2

Which of the following is not an SI base unit?

Accepted Answer

A)   meter
B)   ampere
C)   second
D)   gram
E)   kelvinF) C) and D)
G) D) and E)

Question 3

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

Accepted Answer

A)   387.6 K
B)   355.6 K
C)   323.6 K
D)   190.8 K
E)   -190.8 KF) None of the above
G) C) and D)

Question 4

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) A) and E)
G) A) and B)

Question 5

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm × 9.6114 g ÷ 1.4783 cm2 =

Accepted Answer

A)   105.2 g/cm3
B)   105.2 g/cm2
C)   105.2 g/cm
D)   72.13 g/cm2
E)   72.13 g/cmF) B) and D)
G) A) and B)

Question 6

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Accepted Answer

A) True 
 B)False

Question 7

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Accepted Answer

A)   382.0°C
B)   167.7°C
C)   153.4°C
D)   117.9°C
E)   103.7°CF) D) and E)
G) B) and C)

Question 8

The average distance from Earth to the Sun is 150 megameters. What is that distance in meters?

Accepted Answer

A)   1.5 × 108 m
B)   1.5 × 106 m
C)   1.5 × 105 m
D)   1.5 × 103 m
E)   1.5 × 10-6 mF) B) and C)
G) C) and D)

Question 9

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Accepted Answer

A) True 
 B)False

Question 10

Which measurement is expressed to 4 significant figures?

Accepted Answer

A)   0.423 kg
B)   24.049 cm
C)   1300 K
D)   82,306 m
E)   62.40 gF) None of the above
G) All of the above

Question 11

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Accepted Answer

A)   £1310
B)   £3510
C)   £6370
D)   £10400
E)   £17100F) C) and D)
G) B) and D)

Question 12

Write the following numbers and results in scientific notation, with appropriate significant figures.
a. 654
b. 1234560
c. 0.000000673
d. 0.002590
e. 200.4
f. 260.0
g. F1F1F1S1F1F1F10r2, where r = 8.7 cm
h. 23.24 + 18.6 - 5

Accepted Answer

a. 6.54 × 10²
b. 1.23456 × 10⁶
c...

Question 13

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) A) and C)
G) C) and D)

Question 14

Classify the following properties of hydrogen gas as either intensive or extensive.
a. the mass of the gas sample
b. the average speed of a molecule in the sample
c. temperature
d. density
e. number of molecules present

Accepted Answer

a. E
b. I
...

Question 15

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Accepted Answer

A) True 
 B)False

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

In an average year, the American chemical industry produces more than 9.5 million metric tons of sodium carbonate. Over half of this is used in the manufacture of glass while another third is used in the production of detergents and other chemicals. How many pounds of sodium carbonate are produced annually?

Accepted Answer

A)   2.1 × 1010 lb
B)   4.3 × 109 lb
C)   1.1 × 107 lb
D)   2.2 × 106 lb
E)   2.1 × 104 lbF) B) and D)
G) A) and C)

Question 18

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Accepted Answer

A)   159°F
B)   133°F
C)   101°F
D)   69.0°F
E)   43.4°FF) All of the above
G) A) and D)

Question 19

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

Accepted Answer

A) True 
 B)False

Exam 1: Keys to the Study of Chemistry

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

Correct Answer
verified

The average distance from Earth to the Sun is 150 megameters. What is that distance in meters?

Correct Answer
verified

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas^®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Correct Answer
verified

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Correct Answer
verified

Which of the following is not an SI base unit?

Correct Answer
verified

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

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

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct Answer
verified

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct Answer
verified

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Correct Answer
verified

Write the following numbers and results in scientific notation, with appropriate significant figures. a. 654 b. 1234560 c. 0.000000673 d. 0.002590 e. 200.4 f. 260.0 g. r², where r = 8.7 cm h. 23.24 + 18.6 - 5

Correct Answer
verified
a. 6.54 × 10²
b. 1.23456 × 10⁶
c...
View Answer

Classify the following properties of hydrogen gas as either intensive or extensive. a. the mass of the gas sample b. the average speed of a molecule in the sample c. temperature d. density e. number of molecules present

Correct Answer
verified
a. E
b. I
...
View Answer

Which measurement is expressed to 4 significant figures?

Correct Answer
verified

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm × 9.6114 g ÷ 1.4783 cm² =

Correct Answer
verified

Which of the following is a chemical change?

Correct Answer
verified

Correct Answer
verified

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

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

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct Answer
verified

Exam 1: Keys to the Study of Chemistry

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

Correct AnswerverifiedShow Answer

The average distance from Earth to the Sun is 150 megameters. What is that distance in meters?

Correct AnswerverifiedShow Answer

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Correct AnswerverifiedShow Answer

An important aim in much chemical work is to use macroscopic measurements in order to gain an understanding of the microscopic world.

Correct AnswerverifiedShow Answer

Which of the following is not an SI base unit?

Correct AnswerverifiedShow Answer

Isopropyl alcohol, commonly known as rubbing alcohol, boils at 82.4°C. What is the boiling point in kelvins?

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

The number 6.0448, rounded to 2 decimal places, becomes 6.05.

Correct AnswerverifiedShow Answer

If the price of gold at the morning fixing in London was $5310 per lb, what would a kilogram of gold have cost in £ (pounds) ? (Assume an exchange rate of $1.00 = £0.545)

Correct AnswerverifiedShow Answer

The weight of a coin measured as 1.96235 g on one balance is definitely more accurate than a weight measurement of 1.95 g on another balance.

Correct AnswerverifiedShow Answer

Write the following numbers and results in scientific notation, with appropriate significant figures. a. 654 b. 1234560 c. 0.000000673 d. 0.002590 e. 200.4 f. 260.0 g. r2, where r = 8.7 cm h. 23.24 + 18.6 - 5

Correct Answerverifieda. 6.54 × 102b. 1.23456 × 106c...View AnswerShow Answer

Classify the following properties of hydrogen gas as either intensive or extensive. a. the mass of the gas sample b. the average speed of a molecule in the sample c. temperature d. density e. number of molecules present

Correct Answerverifieda. Eb. I...View AnswerShow Answer

Which measurement is expressed to 4 significant figures?

Correct AnswerverifiedShow Answer

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm × 9.6114 g ÷ 1.4783 cm2 =

Correct AnswerverifiedShow Answer

Which of the following is a chemical change?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

When a wooden match burns in air, chemical potential energy is converted to kinetic energy.

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

Acetic acid boils at 244.2°F. What is its boiling point in degrees Celsius?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Acetone, which is used as a solvent and as a reactant in the manufacture of Plexiglas^®, boils at 56.1°C. What is the boiling point in degrees Fahrenheit?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Write the following numbers and results in scientific notation, with appropriate significant figures. a. 654 b. 1234560 c. 0.000000673 d. 0.002590 e. 200.4 f. 260.0 g. r², where r = 8.7 cm h. 23.24 + 18.6 - 5

Correct Answer
verified
a. 6.54 × 10²
b. 1.23456 × 10⁶
c...
View Answer

Correct Answer
verified
a. E
b. I
...
View Answer

Correct Answer
verified

Select the answer that expresses the result of this calculation with the correct number of significant figures and with correct units. 16.18 cm × 9.6114 g ÷ 1.4783 cm² =

Correct Answer
verified

Correct Answer
verified

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