Question 1

A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore?

Accepted Answer

A)   0.3 12 g mL-1
B)   0. 633 g mL-1
C)   1. 58 g mL-1
D)   3.21 g mL-1E) A) and D)
F) C) and D)

Question 2

A substance composed of two or more elements in a fixed, definite proportion is ________.

Accepted Answer

A)   a homogeneous mixture
B)   a heterogeneous mixture
C)   a compound
D)   a solution
E)   an alloyF) None of the above
G) A) and E)

Question 3

Convert 1.34 km2 to m2.

Accepted Answer

A)   1340000 m2
B)   134000 m2
C)   1.34 × 107 m2
D)   1.34 × 104 m2
E)   1340 m2F) None of the above
G) C) and E)

Question 4

Convert 12.5 μL to L and express it in scientific notation.

Accepted Answer

A)   1.25*105 L
B)   1.25*107 L
C)   1.25*10-3 L
D)   1.25*10-7 L
E)   1.25*10-5 LF) A) and D)
G) B) and E)

Question 5

Define energy.

Accepted Answer

Energy is ...

Question 6

Which of the following is an example of intensive properties?

Accepted Answer

A)   density
B)   volume
C)   mass
D)   None of the above is an example of intensive properties.
E)   All of the above are examples of intensive properties.F) C) and D)
G) None of the above

Question 7

Which of the following numbers has the greatest number of significant figures?

Accepted Answer

A)   0. 5070
B)   0 .201
C)   418000
D)   6.02 × 1024E) None of the above
F) A) and B)

Question 8

Which of the following is an example of a physical change?

Accepted Answer

A)   Dew forms on a blade of grass.
B)   A Halloween light stick glows after shaking.
C)   An egg solidifies during cooking.
D)   A hydrogen balloon explodes when contacted with a flame.
E)   None of the above is a physical change.F) B) and D)
G) None of the above

Question 9

If the outside air temperature is 30 °F, what is the temperature in kelvin?

Accepted Answer

A)   303 K
B)   307 K
C)   274 K
D)   272 KE) C) and D)
F) A) and C)

Question 10

Two or more substances in variable proportions, where the composition is variable throughout, are ________.

Accepted Answer

A)   a solution
B)   a homogeneous mixture
C)   a compound
D)   an amorphous solid
E)   a heterogeneous mixtureF) A) and C)
G) B) and D)

Question 11

How many kL does a 1.25 × 108 cL sample contain?

Accepted Answer

A)   1.25 × 103 kL
B)   1.25 × 1013 kL
C)   1.25 × 104 kL
D)   1.25 × 1012 kL
E)   1.25 × 102 kLF) A) and D)
G) B) and D)

Question 12

Convert 4 μm to metres.

Accepted Answer

A)   4 × 10-9 m
B)   4 × 10-6 m
C)   4 × 10-3 m
D)   4 × 106 mE) None of the above
F) C) and D)

Exam 1: Units of Measurement for Physical and Chemical Change

Define energy.

Correct Answer
verified
Energy is ...
View Answer

A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore?

Correct Answer
verified

A substance composed of two or more elements in a fixed, definite proportion is ________.

Correct Answer
verified

Convert 1.34 km² to m².

Correct Answer
verified

Convert 12.5 μL to L and express it in scientific notation.

Correct Answer
verified

Which of the following is an example of intensive properties?

Correct Answer
verified

If the outside air temperature is 30 °F, what is the temperature in kelvin?

Correct Answer
verified

Convert 4 μm to metres.

Correct Answer
verified

Which of the following numbers has the greatest number of significant figures?

Correct Answer
verified

How many kL does a 1.25 × 10⁸ cL sample contain?

Correct Answer
verified

Two or more substances in variable proportions, where the composition is variable throughout, are ________.

Correct Answer
verified

Which of the following is an example of a physical change?

Correct Answer
verified

Exam 1: Units of Measurement for Physical and Chemical Change

Define energy.

Correct AnswerverifiedEnergy is ...View AnswerShow Answer

A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore?

Correct AnswerverifiedShow Answer

A substance composed of two or more elements in a fixed, definite proportion is ________.

Correct AnswerverifiedShow Answer

Convert 1.34 km2 to m2.

Correct AnswerverifiedShow Answer

Convert 12.5 μL to L and express it in scientific notation.

Correct AnswerverifiedShow Answer

Which of the following is an example of intensive properties?

Correct AnswerverifiedShow Answer

If the outside air temperature is 30 °F, what is the temperature in kelvin?

Correct AnswerverifiedShow Answer

Convert 4 μm to metres.

Correct AnswerverifiedShow Answer

Which of the following numbers has the greatest number of significant figures?

Correct AnswerverifiedShow Answer

How many kL does a 1.25 × 108 cL sample contain?

Correct AnswerverifiedShow Answer

Two or more substances in variable proportions, where the composition is variable throughout, are ________.

Correct AnswerverifiedShow Answer

Which of the following is an example of a physical change?

Correct AnswerverifiedShow Answer

Correct Answer
verified
Energy is ...
View Answer

Correct Answer
verified

Correct Answer
verified

Convert 1.34 km² to m².

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many kL does a 1.25 × 10⁸ cL sample contain?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified