Question 1

What answer should be reported, with the correct number of significant figures, for the following calculation? 
10-4.68

Accepted Answer

A)  2.1 × 10-5 
B)  2 09 × 10-5 
C)  2 × 10-5 
D)  2.089 × 10-5 
E)  2.0893 × 10-5 
A)  2.1 × 10-5 
B)  2 09 × 10-5 
C)  2 × 10-5 
D)  2.089 × 10-5 
E)  2.0893 × 10-5

Question 2

Choose the homogeneous mixture from the list below.

Accepted Answer

A)  chicken noodle soup 
B)  air 
C)  concrete 
D)  trail mix 
E)  blood 
A)  chicken noodle soup 
B)  air 
C)  concrete 
D)  trail mix 
E)  blood

Question 3

Read the temperature with the correct number of significant figures.

Accepted Answer

A)  87 °C 
B)  87.2 °C 
C)  87.20 °C 
D)  87.200 °C 
E)  87.2000 °C 
A)  87 °C 
B)  87.2 °C 
C)  87.20 °C 
D)  87.200 °C 
E)  87.2000 °C

Question 4

What answer should be reported, with the correct number of significant figures, for the following calculation? 6.83192458 + log(6.7831 × 104)

Accepted Answer

A)  11.66335 
B)  11.663353 
C)  11.6634 
D)  11.6633528 
E)  11.663 
A)  11.66335 
B)  11.663353 
C)  11.6634 
D)  11.6633528 
E)  11.663

Question 5

Ampere is a measure of ________.

Accepted Answer

A)  luminous intensity 
B)  amount 
C)  mass 
D)  length 
E)  current 
A)  luminous intensity 
B)  amount 
C)  mass 
D)  length 
E)  current

Question 6

If the melting point of vanadium metal is 1910 °C, what is its melting point in kelvin?

Accepted Answer

A)  1029 K 
B)  1637 K 
C)  2183 K 
D)  3470 K 
A)  1029 K 
B)  1637 K 
C)  2183 K 
D)  3470 K

Question 7

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

Accepted Answer

A)  Burning wood 
B)  Melting ice 
C)  Digesting food 
D)  Souring milk 
E)  Making water from hydrogen gas and oxygen gas 
A)  Burning wood 
B)  Melting ice 
C)  Digesting food 
D)  Souring milk 
E)  Making water from hydrogen gas and oxygen gas

Question 8

How many significant figures are in the measurement 463.090 m?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 9

What happens to the density of a sample of iron metal as it is heated from room temperature to 100 °C? (This is below the melting point of iron.)

Accepted Answer

Since the mass of the iron sta

Question 10

If an object has a density of 8.65 g cm-3, what is its density in units of kg m-3?

Accepted Answer

A)  8.65 × 10-3 kg m-3 
B)  8.65 × 10-7 kg m-3 
C)  8.65 × 103 kg m-3 
D)  8.65 × 101 kg m-3 
E)  8.65 × 10-1 kg m-3 
A)  8.65 × 10-3 kg m-3 
B)  8.65 × 10-7 kg m-3 
C)  8.65 × 103 kg m-3 
D)  8.65 × 101 kg m-3 
E)  8.65 × 10-1 kg m-3

Question 11

A substance that can't be chemically broken down into simpler substances is ________.

Accepted Answer

A)  a homogeneous mixture 
B)  an element 
C)  a heterogeneous mixture 
D)  a compound 
E)  an electron 
A)  a homogeneous mixture 
B)  an element 
C)  a heterogeneous mixture 
D)  a compound 
E)  an electron

Question 12

The width, length, and height of a large, custom-made shipping crate are 1.31 m, 3.26 m, and 0.88 m respectively. The volume of the box using the correct number of significant figures is ________ m3.

Accepted Answer

A)  3.8 
B)  3.76 
C)  3.758 
D)  3.75813 
E)  3.7558 
A)  3.8 
B)  3.76 
C)  3.758 
D)  3.75813 
E)  3.7558

Question 13

The mass of a single zinc atom is 1. 086 × 10-22 g. This is the same mass as ________.

Accepted Answer

A)  1.086 × 10-16 mg 
B)  1.086 × 10-25 kg 
C)  1.086 × 10-28 μg 
D)  1.086 × 10-31 ng 
A)  1.086 × 10-16 mg 
B)  1.086 × 10-25 kg 
C)  1.086 × 10-28 μg 
D)  1.086 × 10-31 ng

Question 14

How many significant figures are in 1009.630 mL?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
E)  7 
A)  3 
B)  4 
C)  5 
D)  6 
E)  7

Question 15

How many ns are in 16 ms?

Accepted Answer

A)  1.6 × 10-2 ns 
B)  1.6 × 107 ns 
C)  1.6 × 10-5 ns 
D)  1.6 × 105 ns 
E)  1.6 × 102 ns 
A)  1.6 × 10-2 ns 
B)  1.6 × 107 ns 
C)  1.6 × 10-5 ns 
D)  1.6 × 105 ns 
E)  1.6 × 102 ns

Question 16

A person is 64.00 inches tall. How tall is she in cm?

Accepted Answer

A)  162.6 cm 
B)  25.20 cm 
C)  25.60 cm 
D)  192.0 cm 
E)  128.0 cm 
A)  162.6 cm 
B)  25.20 cm 
C)  25.60 cm 
D)  192.0 cm 
E)  128.0 cm

Question 17

How many square kilometres (km2) are in 246 square miles? (1 km = 0.621371 miles)

Accepted Answer

A)  153 km2 
B)  481 km2 
C)  396 km2 
D)  95.0 km2 
E)  637 km2 
A)  153 km2 
B)  481 km2 
C)  396 km2 
D)  95.0 km2 
E)  637 km2

Question 18

Which of the following volumes is equal to 40 mL?

Accepted Answer

A)  40 cm3 
B)  40 dm3 
C)  0. 40 L 
D)  0.000 40 kL 
A)  40 cm3 
B)  40 dm3 
C)  0. 40 L 
D)  0.000 40 kL

Question 19

What does it mean to be an exact number? Give an example of an exact number.

Accepted Answer

An exact number has an infinite number o

Question 20

An alligator is 244.0 cm long. How long is it in feet?

Accepted Answer

A)  8.00 ft 
B)  96.0 ft 
C)  20.3 ft 
D)  6.00 ft 
E)  9.00 ft 
A)  8.00 ft 
B)  96.0 ft 
C)  20.3 ft 
D)  6.00 ft 
E)  9.00 ft

Exam 1: Units of Measurement for Physical and Chemical Change

What answer should be reported, with the correct number of significant figures, for the following calculation? 10-4.68

Choose the homogeneous mixture from the list below.

Read the temperature with the correct number of significant figures.

What answer should be reported, with the correct number of significant figures, for the following calculation? 6.83192458 + log(6.7831 × 104)

Ampere is a measure of ________.

If the melting point of vanadium metal is 1910 °C, what is its melting point in kelvin?

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

How many significant figures are in the measurement 463.090 m?

What happens to the density of a sample of iron metal as it is heated from room temperature to 100 °C? (This is below the melting point of iron.)

If an object has a density of 8.65 g cm-3, what is its density in units of kg m-3?

A substance that can't be chemically broken down into simpler substances is ________.

The width, length, and height of a large, custom-made shipping crate are 1.31 m, 3.26 m, and 0.88 m respectively. The volume of the box using the correct number of significant figures is ________ m3.

The mass of a single zinc atom is 1. 086 × 10-22 g. This is the same mass as ________.

How many significant figures are in 1009.630 mL?

How many ns are in 16 ms?

A person is 64.00 inches tall. How tall is she in cm?

How many square kilometres (km2) are in 246 square miles? (1 km = 0.621371 miles)

Which of the following volumes is equal to 40 mL?

What does it mean to be an exact number? Give an example of an exact number.

An alligator is 244.0 cm long. How long is it in feet?

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

What answer should be reported, with the correct number of significant figures, for the following calculation? 10^-4.68

What answer should be reported, with the correct number of significant figures, for the following calculation? 6.83192458 + log(6.7831 × 10⁴)

If an object has a density of 8.65 g cm^-3, what is its density in units of kg m^-3?

The width, length, and height of a large, custom-made shipping crate are 1.31 m, 3.26 m, and 0.88 m respectively. The volume of the box using the correct number of significant figures is ________ m³.

The mass of a single zinc atom is 1. 086 × 10^-22 g. This is the same mass as ________.

How many square kilometres (km²) are in 246 square miles? (1 km = 0.621371 miles)