Question 1

What is something that has a definite composition?

Accepted Answer

The answer of What is something that has a definite...

Question 2

When applying the scientific method,it is important to avoid any form of hypothesis.

Accepted Answer

A) True 
 B)False

Question 3

Which of these is an example of a physical property?

Accepted Answer

A)  Corrosiveness of sulfuric acid
B)  Toxicity of cyanide
C)  Flammability of gasoline
D)  Neutralization of stomach acid with an antacid
E)  Lead becomes a liquid when heated to 601°C.F) None of the above
G) A) and D)

Question 4

Matter is anything that has mass and occupies space.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is not an SI base unit?

Accepted Answer

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

Question 6

How many milliliters is 0.0055 L?

Accepted Answer

A)  0.55 mL
B)  5.5 mL
C)  0.5 mL
D)  0.0000055 mL
E)  182 mLF) None of the above
G) C) and E)

Question 7

Burning wood in a fireplace is a __________ change.

Accepted Answer

The answer of Burning wood in a fireplace is a...

Question 8

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

Question 9

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 10

Which of the following is an extensive property of oxygen?

Accepted Answer

A)  Boiling point
B)  Temperature
C)  Average kinetic energy of molecules
D)  Density
E)  MassF) D) and E)
G) C) and D)

Question 11

If a liquid contains 60% sugar and 40% water throughout its composition then what is it called?

Accepted Answer

A)  Solute
B)  Compound
C)  Homogeneous mixture
D)  Heterogeneous mixture
E)  SolventF) B) and C)
G) D) and E)

Question 12

If you have a graduated cylinder containing 15.5 mL and this volume changes to 95.2 mL after a metal with a mass of 7.95 g is dropped into the graduated cylinder,then what is the density of this metal?

Accepted Answer

A)  0.0835 g/mL
B)  0.513 g/mL
C)  0.0718 g/mL
D)  10.0 g/mL
E)  9.97 × 10-2 g/mLF) All of the above
G) B) and E)

Question 13

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

Accepted Answer

mass = den...

Question 14

Some molecules move with speeds approaching the "escape velocity" from Earth,which is 7.0 miles per second.What is this speed in cm/h? (1 mi = 1609 m)

Accepted Answer

A)  313 cm/h
B)  4.1 × 105 cm/h
C)  4.1 × 109 cm/h
D)  1.1 × 106 cm/h
E)  1.6 × 109 cm/hF) B) and D)
G) A) and B)

Question 15

The mass of a sample is 550 milligrams.Which of the following expresses that mass in kilograms?

Accepted Answer

A)  5.5 × 108 kg
B)  5.5 × 105 kg
C)  5.5 × 10-4 kg
D)  5.5 × 10-6 kg
E)  5.5 × 10-1 kgF) A) and E)
G) C) and E)

Question 16

The SI prefix mega- (M) means

Accepted Answer

A)  10-6
B)  10-3
C)  103
D)  106
E)  109F) D) and E)
G) A) and B)

Question 17

Which of the following cannot be separated into simpler substances by chemical means?

Accepted Answer

A)  Element
B)  Emulsion
C)  Compound
D)  Homogeneous mixture
E)  Heterogeneous mixtureF) A) and E)
G) C) and E)

Question 18

A large pizza has a diameter of 15 inches.Express this diameter in centimeters.(1 in = 2.54 cm)

Accepted Answer

A)  38 cm
B)  24 cm
C)  18 cm
D)  9.3 cm
E)  5.9 cmF) A) and D)
G) D) and E)

Question 19

Given that 1 inch = 2.54 cm,1.00 cm3 is equal to

Accepted Answer

A)  16.4 in3
B)  6.45 in3
C)  0.394 in3
D)  0.155 in3
E)  0.0610 in3F) A) and B)
G) A) and D)

Question 20

Explain the difference between an extensive property and an intensive property.

Accepted Answer

An extensive property depends ...

Exam 1: Chemistry: the Central Science

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

Correct AnswerverifiedShow Answer

How many milliliters is 0.0055 L?

Correct AnswerverifiedShow Answer

Which of these is an example of a physical property?

Correct AnswerverifiedShow Answer

Given that 1 inch = 2.54 cm,1.00 cm3 is equal to

Correct AnswerverifiedShow Answer

A large pizza has a diameter of 15 inches.Express this diameter in centimeters.(1 in = 2.54 cm)

Correct AnswerverifiedShow Answer

Matter is anything that has mass and occupies space.

Correct AnswerverifiedShow Answer

Explain the difference between an extensive property and an intensive property.

Correct AnswerverifiedAn extensive property depends ...View AnswerShow Answer

The SI prefix mega- (M) means

Correct AnswerverifiedShow Answer

If you have a graduated cylinder containing 15.5 mL and this volume changes to 95.2 mL after a metal with a mass of 7.95 g is dropped into the graduated cylinder,then what is the density of this metal?

Correct AnswerverifiedShow Answer

Which of the following is an extensive property of oxygen?

Correct AnswerverifiedShow Answer

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

Correct Answerverifiedmass = den...View AnswerShow Answer

When applying the scientific method,it is important to avoid any form of hypothesis.

Correct AnswerverifiedShow Answer

The mass of a sample is 550 milligrams.Which of the following expresses that mass in kilograms?

Correct AnswerverifiedShow Answer

If a liquid contains 60% sugar and 40% water throughout its composition then what is it called?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not an SI base unit?

Correct AnswerverifiedShow Answer

Which of the following cannot be separated into simpler substances by chemical means?

Correct AnswerverifiedShow Answer

Some molecules move with speeds approaching the "escape velocity" from Earth,which is 7.0 miles per second.What is this speed in cm/h? (1 mi = 1609 m)

Correct AnswerverifiedShow Answer

What is something that has a definite composition?

Correct AnswerverifiedShow Answer

Burning wood in a fireplace is a __________ change.

Correct AnswerverifiedShow Answer

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Given that 1 inch = 2.54 cm,1.00 cm³ is equal to

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An extensive property depends ...
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mass = den...
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