Question 1

The mask of an empty flask is 17.4916 g, and its mass when filled with water at 20.0°C (density = 0.9982 g/mL)  is 43.9616 g. The density of "heavy water" at 20.0°C is 1.1053 g/mL. What is the mass of the flask when filled with heavy water at 20.0°C?

Accepted Answer

A)   29.2573 g
B)   46.8016 g
C)   46.7489 g
D)   29.3100 g
E)   43.9140 gF) B) and C)
G) A) and D)

Question 2

What is a combination of two or more substances in which the substances retain their distinct identities?

Accepted Answer

The answer of What is a combination of two or...

Question 3

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) E

Question 4

What is the volume in milliliters of a 32.0 fl oz can of juice? (1 fl oz = 29.6 mL)

Accepted Answer

A)   1.08 mL
B)   947 mL
C)   0.925 mL
D)   0.95 mL
E)   1.1 mLF) All of the above
G) B) and D)

Question 5

The volume of a substance is an intensive property.

Accepted Answer

A) True 
 B)False

Question 6

If two numbers are multiplied together, one which has 3 significant figures and the other which has 4 significant figures, explain how to round the answer.

Accepted Answer

The answer will have 3 signifi...

Question 7

Explain the rule for significant figures for addition and subtraction.

Accepted Answer

The answer cannot have more di...

Question 8

What is a substance that cannot be separated into simpler substances by chemical means?

Accepted Answer

element

Question 9

A ________ mixture has a uniform composition throughout.

Accepted Answer

A)   heterogeneous
B)   homologous
C)   homogeneous
D)   heterologousE) All of the above
F) None of the above C

Question 10

A geology student found an irregularly shaped rock, with a mass of 28.63 grams, and placed it into a graduated cylinder containing 13.31 mL of water. If the water level increased to 19.73 mL after the rock was placed in the cylinder, what is the density of the rock, in g/mL?

Accepted Answer

A)   4.46 g/mL
B)   4460 g/mL
C)   2.20 g/mL
D)   0.455 g/mL
E)   44.6 g/mLF) All of the above
G) A) and B)

Question 11

Zero kelvin 0 K < 0°F < 0°C.

Accepted Answer

A) True 
 B)False

Question 12

The diameter of Earth is 12.7 Mm. Express this diameter in centimeters.

Accepted Answer

A)   1.27 × 105 cm
B)   1.27 × 106 cm
C)   1.27 × 107 cm
D)   1.27 × 108 cm
E)   1.27 × 109 cmF) D) and E)
G) C) and D)

Question 13

Which one of these represents a chemical change?

Accepted Answer

A)   Boiling water to form steam
B)   Turning hair yellow with bleach
C)   Melting butter
D)   Mixing powdered charcoal and oxygen at room temperature
E)   Cutting a bar of sodium metal into pieces with a knifeF) A) and B)
G) C) and E)

Question 14

Which of the following is not an SI base unit?

Accepted Answer

A)   Meter
B)   Ampere
C)   Second
D)   Gram
E)   KelvinF) A) and D)
G) All of the above

Question 15

A(n)________ is a combination of two or more substances in which the substances retain their distinct identities.

Accepted Answer

The answer of A(n)________ is a combination of two or...

Question 16

Boiling point and melting point are extensive properties.

Accepted Answer

A) True 
 B)False

Question 17

What is the equation used to calculate the mass from the density?

Accepted Answer

mass = den...

Question 18

What is a substance composed of atoms of two or more elements chemically united in fixed proportions?

Accepted Answer

The answer of What is a substance composed of atoms...

Question 19

Identify this process as a physical or chemical change: Bacteria convert milk to yogurt.

Accepted Answer

The answer of Identify this process as a physical or...

Question 20

How many significant figures does the sum 8.5201 + 1.93 contain?

Accepted Answer

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

Exam 1: Chemistry: the Central Science

The mask of an empty flask is 17.4916 g, and its mass when filled with water at 20.0°C (density = 0.9982 g/mL) is 43.9616 g. The density of "heavy water" at 20.0°C is 1.1053 g/mL. What is the mass of the flask when filled with heavy water at 20.0°C?

Correct AnswerverifiedShow Answer

What is a combination of two or more substances in which the substances retain their distinct identities?

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 AnswerverifiedE

What is the volume in milliliters of a 32.0 fl oz can of juice? (1 fl oz = 29.6 mL)

Correct AnswerverifiedShow Answer

The volume of a substance is an intensive property.

Correct AnswerverifiedShow Answer

If two numbers are multiplied together, one which has 3 significant figures and the other which has 4 significant figures, explain how to round the answer.

Correct AnswerverifiedThe answer will have 3 signifi...View AnswerShow Answer

Explain the rule for significant figures for addition and subtraction.

Correct AnswerverifiedThe answer cannot have more di...View AnswerShow Answer

What is a substance that cannot be separated into simpler substances by chemical means?

Correct Answerverifiedelement

A ________ mixture has a uniform composition throughout.

Correct AnswerverifiedC

A geology student found an irregularly shaped rock, with a mass of 28.63 grams, and placed it into a graduated cylinder containing 13.31 mL of water. If the water level increased to 19.73 mL after the rock was placed in the cylinder, what is the density of the rock, in g/mL?

Correct AnswerverifiedShow Answer

Zero kelvin 0 K < 0°F < 0°C.

Correct AnswerverifiedShow Answer

The diameter of Earth is 12.7 Mm. Express this diameter in centimeters.

Correct AnswerverifiedShow Answer

Which one of these represents a chemical change?

Correct AnswerverifiedShow Answer

Which of the following is not an SI base unit?

Correct AnswerverifiedShow Answer

A(n)________ is a combination of two or more substances in which the substances retain their distinct identities.

Correct AnswerverifiedShow Answer

Boiling point and melting point are extensive properties.

Correct AnswerverifiedShow Answer

What is the equation used to calculate the mass from the density?

Correct Answerverifiedmass = den...View AnswerShow Answer

What is a substance composed of atoms of two or more elements chemically united in fixed proportions?

Correct AnswerverifiedShow Answer

Identify this process as a physical or chemical change: Bacteria convert milk to yogurt.

Correct AnswerverifiedShow Answer

How many significant figures does the sum 8.5201 + 1.93 contain?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The answer will have 3 signifi...
View Answer

Correct Answer
verified
The answer cannot have more di...
View Answer

Correct Answer
verified
element

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
mass = den...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified