Question 1

Give the correct number of significant figures and units to the problem below. (3.45 m + 2.78 m) / 565 s =

Accepted Answer

A)   1.10 x 10-2 m2/s
B)   1.10 x 10-2 m/s
C)   1.10 x 10-2 s-1
D)   1.10 x 10-2 s
E)   1.10 x 10-2 m2F) None of the above
G) A) and C)

Question 2

The SI prefixes micro and milli represent, respectively:

Accepted Answer

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

Question 3

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) None of the above
G) A) and D)

Question 4

What is the density of copper if 11.8 cm3 of copper has a mass of 105.2 g

Accepted Answer

A)   7.92 g/cm3
B)   8.92 g/cm3
C)   9.92 g/cm3
D)   10.92 g/cm3
E)   None of the aboveF) A) and B)
G) B) and D)

Question 5

Alcohol evaporating is a physical change.

Accepted Answer

A) True 
 B)False

Question 6

The number 1.050 * 109 has how many significant figures

Accepted Answer

A)   2
B)   3
C)   4
D)   9
E)   13F) A) and C)
G) A) and B)

Question 7

If a car has an EPA mileage rating of 30 miles per gallon, what is this rating in kilometers per liter (1 L = 1.06 qt)

Accepted Answer

A)   200 km/L
B)   180 km/L
C)   70 km/L
D)   13 km/L
E)   11 km/LF) A) and D)
G) B) and E)

Question 8

Melting point is an extensive property.

Accepted Answer

A) True 
 B)False

Question 9

The formation of snowflakes is a physical change.

Accepted Answer

A) True 
 B)False

Question 10

A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron The following densities at 25 ∘\circ∘ C are provided: agnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.

Accepted Answer

A)   110 g
B)   2120 g
C)   6870 g
D)   34 g
E)   none of them are within 10 g of the right answer. F) A) and B)
G) C) and E)

Question 11

Give the correct number of significant figures to the problem below.4.5 x 1014 / 8.3 x 108 =

Accepted Answer

A)   5.4 x 1021
B)   5.4 x 1022
C)   5.4 x 106
D)   5.4 x 1014
E)   5.4 x 105F) A) and E)
G) B) and E)

Question 12

The "escape velocity" from Earth (the speed required to escape Earth's gravity)  is 2.5 * 104 miles per hour. What is this speed in m/s (1 mile = 1609 m)

Accepted Answer

A)   4.2 * 10-3 m/s
B)   6.9 m/s
C)   4.2 * 102 m/s
D)   1.1 * 104 m/s
E)   4.0 * 107 m/sF) A) and E)
G) C) and D)

Question 13

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in cubic inches. (1 in = 2.54 cm)

Accepted Answer

A)   .0998 in3
B)   9.8 in3
C)   98 in3
D)   9980 in3
E)   None of the aboveF) A) and E)
G) None of the above

Question 14

If the price of gasoline is $3.85 per U.S. gallon, what is the cost per liter (1 L = 1.06 qt)

Accepted Answer

A)   $1.02/L
B)   $14.60/L
C)   $0.96/L
D)   $3.85/L
E)   $3.63/LF) A) and B)
G) A) and C)

Question 15

Give the correct number of significant figures and units to the problem below. 3.4 x 10-2 mg + 448 µg =

Accepted Answer

A)   0.48 mg
B)   0.482 mg
C)   4.5 mg
D)   4.48 mg
E)   4.5 x 102 mgF) B) and D)
G) A) and C)

Question 16

Which of the following is true of a compound

Accepted Answer

A)  A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio.
B)  A compound is a substance that cannot be separated into simpler substances by chemical means.
C)  A compound is combination of two or more substances in which the substances retain their distinct identities.
D)   A compound must be heterogeneous.
E)   A compound must be a solid at room temperature.F) A) and B)
G) A) and D)

Question 17

A long course triathlon entails a 2.0 mile swim, an 85.5 mile bike ride and a 15.0 mile run. What is the total distance in kilometers for the triathlon

Accepted Answer

A)   160 km
B)   165 km
C)   103 km
D)   164.9 km
E)   102.5 kmF) C) and D)
G) A) and B)

Question 18

Seven-Up is a pure substance.

Accepted Answer

A) True 
 B)False

Question 19

How many square kilometers are equivalent to 28.5 cm2

Accepted Answer

A)   2.85 * 10-9 km2
B)   2.85 * 10-6 km2
C)   285 km2
D)   2.85 * 10-4 km2
E)   none of theseF) C) and E)
G) A) and C)

Question 20

Convert 7.2 cm3 to mm3.

Accepted Answer

A)   7.2 x 101 mm3
B)   7.2 x 10-5 mm3
C)   7.2 x 10-3 mm3
D)   7.2 x 102 mm3
E)   7.2 x 103 mm3F) None of the above
G) C) and D)

Exam 1: Chemistry: The Study of Change

Give the correct number of significant figures and units to the problem below. (3.45 m + 2.78 m) / 565 s =

Correct AnswerverifiedShow Answer

The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 * 104 miles per hour. What is this speed in m/s (1 mile = 1609 m)

Correct AnswerverifiedShow Answer

If the price of gasoline is $3.85 per U.S. gallon, what is the cost per liter (1 L = 1.06 qt)

Correct AnswerverifiedShow Answer

An automobile engine has a piston displacement of 1,600 cm3. Express this volume in cubic inches. (1 in = 2.54 cm)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Alcohol evaporating is a physical change.

Correct AnswerverifiedShow Answer

Give the correct number of significant figures to the problem below.4.5 x 1014 / 8.3 x 108 =

Correct AnswerverifiedShow Answer

Which of the following is true of a compound

Correct AnswerverifiedShow Answer

Convert 7.2 cm3 to mm3.

Correct AnswerverifiedShow Answer

How many square kilometers are equivalent to 28.5 cm2

Correct AnswerverifiedShow Answer

The SI prefixes micro and milli represent, respectively:

Correct AnswerverifiedShow Answer

Melting point is an extensive property.

Correct AnswerverifiedShow Answer

The formation of snowflakes is a physical change.

Correct AnswerverifiedShow Answer

The number 1.050 * 109 has how many significant figures

Correct AnswerverifiedShow Answer

Seven-Up is a pure substance.

Correct AnswerverifiedShow Answer

A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron The following densities at 25 ∘\circ∘ C are provided: agnesium, 1.7 g/cm3 ; graphite, 1.8 g/cm3 ; iron, 7.9 g/cm3.

Correct AnswerverifiedShow Answer

Give the correct number of significant figures and units to the problem below. 3.4 x 10-2 mg + 448 µg =

Correct AnswerverifiedShow Answer

A long course triathlon entails a 2.0 mile swim, an 85.5 mile bike ride and a 15.0 mile run. What is the total distance in kilometers for the triathlon

Correct AnswerverifiedShow Answer

If a car has an EPA mileage rating of 30 miles per gallon, what is this rating in kilometers per liter (1 L = 1.06 qt)

Correct AnswerverifiedShow Answer

What is the density of copper if 11.8 cm3 of copper has a mass of 105.2 g

Correct AnswerverifiedShow Answer

Correct Answer
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The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 * 10⁴miles per hour. What is this speed in m/s (1 mile = 1609 m)

Correct Answer
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Correct Answer
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An automobile engine has a piston displacement of 1,600 cm³. Express this volume in cubic inches. (1 in = 2.54 cm)

Correct Answer
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Correct Answer
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Correct Answer
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Give the correct number of significant figures to the problem below.4.5 x 10¹⁴ / 8.3 x 10⁸ =

Correct Answer
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Correct Answer
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Convert 7.2 cm³ to mm³.

Correct Answer
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How many square kilometers are equivalent to 28.5 cm²

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The number 1.050 * 10⁹ has how many significant figures

Correct Answer
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Correct Answer
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A block of iron has a mass of 483 g. What is the mass of a block of graphite that has the same volume as the block of iron The following densities at 25^$\circ$C are provided: agnesium, 1.7 g/cm³ ; graphite, 1.8 g/cm³ ; iron, 7.9 g/cm³.

Correct Answer
verified

Give the correct number of significant figures and units to the problem below. 3.4 x 10^-2 mg + 448 µg =

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the density of copper if 11.8 cm³ of copper has a mass of 105.2 g

Correct Answer
verified