Question 1

How many of the following numbers contain three significant figures?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
A)  one 
B)  two 
C)  three 
D)  four

Question 2

An acetylene molecule contains 2 atoms of carbon. The number 2 represents how many significant figures?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  infinite 
A)  one 
B)  two 
C)  three 
D)  infinite

Question 3

Define matter.

Accepted Answer

Matter is anything t

Question 4

What is the area, in m2, of a house that has 1236 square feet of floor space? (1 foot = 0.3048 m)

Accepted Answer

A)  376.7 m2 
B)  214.8 m2 
C)  114.8 m2 
D)  687 m2 
E)  573 m2 
A)  376.7 m2 
B)  214.8 m2 
C)  114.8 m2 
D)  687 m2 
E)  573 m2

Question 5

What answer should be reported, with the correct number of significant figures, for the following calculation? 100 × 10-1.4 + log(1.6 × 102)

Accepted Answer

A)  6.2 
B)  6.19 
C)  6.18 
D)  6 
E)  6.185 
A)  6.2 
B)  6.19 
C)  6.18 
D)  6 
E)  6.185

Question 6

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g mL-1, 1.81 g mL-1, 1.80 g mL-1, 1.81 g mL-1. If the actual value for the density of the sugar solution is 1.80 g mL-1, which statement below best describes her results?

Accepted Answer

A)  Her results are precise, but not accurate. 
B)  Her results are accurate, but not precise. 
C)  Her results are both precise and accurate 
D)  Her results are neither precise nor accurate. 
E)  It isn't possible to determine from the information given. 
A)  Her results are precise, but not accurate. 
B)  Her results are accurate, but not precise. 
C)  Her results are both precise and accurate 
D)  Her results are neither precise nor accurate. 
E)  It isn't possible to determine from the information given.

Question 7

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g mL-1.

Accepted Answer

A)  87.9 mL 
B)  42.4 mL 
C)  18.5 mL 
D)  23.6 mL 
E)  31.2 mL 
A)  87.9 mL 
B)  42.4 mL 
C)  18.5 mL 
D)  23.6 mL 
E)  31.2 mL

Question 8

Mole 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 9

How many significant figures are in the measurement 0.0005890 g?

Accepted Answer

A)  4 
B)  5 
C)  6 
D)  7 
E)  8 
A)  4 
B)  5 
C)  6 
D)  7 
E)  8

Question 10

Identify the common substance that has the highest density.

Accepted Answer

A)  sugar 
B)  water 
C)  glass 
D)  lead 
E)  aluminum 
A)  sugar 
B)  water 
C)  glass 
D)  lead 
E)  aluminum

Question 11

Match the following.
-kilo

Accepted Answer

A) 10-9 
B) 103 
C) 10-6 
D) 106 
E) 10-1
F)10-3
G)10-2 
A) 10-9 
B) 103 
C) 10-6 
D) 106 
E) 10-1
F)10-3
G)10-2

Question 12

What is the correct answer, with the proper number of significant figures, for the following calculation?
( 1815 - 1806) × ( 9.11 × 7.92)

Accepted Answer

The answer of What is the correct answer, with the...

Question 13

Without using a calculator, solve the following problem:

Accepted Answer

A)  1 × 10-4 
B)  1 × 105 
C)  1 × 1023 
D)  1 × 1032 
A)  1 × 10-4 
B)  1 × 105 
C)  1 × 1023 
D)  1 × 1032

Question 14

If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd)

Accepted Answer

A)  47 gallons 
B)  21 gallons 
C)  7.1 gallons 
D)  24 gallons 
E)  2.3 gallons 
A)  47 gallons 
B)  21 gallons 
C)  7.1 gallons 
D)  24 gallons 
E)  2.3 gallons

Question 15

Read the length of the metal bar with the correct number of significant figures.

Accepted Answer

A)  20 cm 
B)  15 cm 
C)  15.0 cm 
D)  15.00 cm 
E)  15.000 cm 
A)  20 cm 
B)  15 cm 
C)  15.0 cm 
D)  15.00 cm 
E)  15.000 cm

Question 16

________ is the energy associated with motion of an object.

Accepted Answer

A)  Potential energy 
B)  Kinetic energy 
C)  Total energy 
D)  Solar energy 
E)  Gravitational energy 
A)  Potential energy 
B)  Kinetic energy 
C)  Total energy 
D)  Solar energy 
E)  Gravitational energy

Question 17

Ethanol has a freezing point of 159 K. What is the freezing point in °C?

Accepted Answer

A)  -81 °C 
B)  -78 °C 
C)  -62 °C 
D)  -114 °C 
E)  -195 °C 
A)  -81 °C 
B)  -78 °C 
C)  -62 °C 
D)  -114 °C 
E)  -195 °C

Question 18

The mass of a proton is 1.67 × 10-27 kg. What is the mass of a proton in nanograms?

Accepted Answer

A)  1.67 × 10-21 ng 
B)  1.67 × 10-18 ng 
C)  1.67 × 10-15 ng 
D)  1.67 × 10-12 ng 
A)  1.67 × 10-21 ng 
B)  1.67 × 10-18 ng 
C)  1.67 × 10-15 ng 
D)  1.67 × 10-12 ng

Question 19

Kelvin is a measure of ________.

Accepted Answer

A)  mass 
B)  time 
C)  temperature 
D)  length 
E)  volume 
A)  mass 
B)  time 
C)  temperature 
D)  length 
E)  volume

Question 20

The factor 1,000,000 corresponds to which prefix?

Accepted Answer

A)  deka 
B)  deci 
C)  mega 
D)  milli 
A)  deka 
B)  deci 
C)  mega 
D)  milli

Exam 1: Units of Measurement for Physical and Chemical Change

How many of the following numbers contain three significant figures?

An acetylene molecule contains 2 atoms of carbon. The number 2 represents how many significant figures?

Define matter.

What is the area, in m2, of a house that has 1236 square feet of floor space? (1 foot = 0.3048 m)

What answer should be reported, with the correct number of significant figures, for the following calculation? 100 × 10-1.4 + log(1.6 × 102)

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g mL-1, 1.81 g mL-1, 1.80 g mL-1, 1.81 g mL-1. If the actual value for the density of the sugar solution is 1.80 g mL-1, which statement below best describes her results?

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g mL-1.

Mole is a measure of ________.

How many significant figures are in the measurement 0.0005890 g?

Identify the common substance that has the highest density.

Match the following. -kilo

What is the correct answer, with the proper number of significant figures, for the following calculation? ( 1815 - 1806) × ( 9.11 × 7.92)

Without using a calculator, solve the following problem:

If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd)

Read the length of the metal bar with the correct number of significant figures.

________ is the energy associated with motion of an object.

Ethanol has a freezing point of 159 K. What is the freezing point in °C?

The mass of a proton is 1.67 × 10-27 kg. What is the mass of a proton in nanograms?

Kelvin is a measure of ________.

The factor 1,000,000 corresponds to which prefix?

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 is the area, in m², of a house that has 1236 square feet of floor space? (1 foot = 0.3048 m)

What answer should be reported, with the correct number of significant figures, for the following calculation? 100 × 10^-1.4 + log(1.6 × 10²)

A student performs an experiment to determine the density of a sugar solution. She obtains the following results: 1.79 g mL^-1, 1.81 g mL^-1, 1.80 g mL^-1, 1.81 g mL^-1. If the actual value for the density of the sugar solution is 1.80 g mL^-1, which statement below best describes her results?

Determine the volume of an object that has a mass of 455.6 g and a density of 19.3 g mL^-1.

The mass of a proton is 1.67 × 10^-27 kg. What is the mass of a proton in nanograms?