Question 1

A solution has a temperature of 18.65 °C. What is the temperature in K?

Accepted Answer

A) 324.80 K 
B) 291.80 K 
C) 301.65 K 
D) 65.57 K 
E) 283.15 K 
A) 324.80 K 
B) 291.80 K 
C) 301.65 K 
D) 65.57 K 
E) 283.15 K

Question 2

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. What is this distance in millimeters?

Accepted Answer

A) 1.15 × 10-8 mm 
B) 1.15 × 10-7 mm 
C) 1.15 × 1013 mm 
D) 1.15 × 1017 mm 
A) 1.15 × 10-8 mm 
B) 1.15 × 10-7 mm 
C) 1.15 × 1013 mm 
D) 1.15 × 1017 mm

Question 3

Identify the unit of measurement that is a SI base unit of measurement.

Accepted Answer

A) second 
B) Celsius 
C) cup 
D) pound 
E) yard 
A) second 
B) Celsius 
C) cup 
D) pound 
E) yard

Question 4

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

Accepted Answer

A) 1.67 × 10-18 pg 
B) 1.67 × 10-15 pg 
C) 1.67 × 10-12 pg 
D) 1.67 × 10-9 pg 
A) 1.67 × 10-18 pg 
B) 1.67 × 10-15 pg 
C) 1.67 × 10-12 pg 
D) 1.67 × 10-9 pg

Question 5

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

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
E) a crystalline solid. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
E) a crystalline solid.

Question 6

Which of the following is an example of 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. 
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.

Question 7

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 8

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 m2 
A) 1340000 m2 
B) 134000 m2 
C) 1.34 × 107 m2 
D) 1.34 × 104 m2 
E) 1340 m2

Question 9

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 m 
A) 4 × 10-9 m 
B) 4 × 10-6 m 
C) 4 × 10-3 m 
D) 4 × 106 m

Question 10

If the speed limit is 40 miles per hour, calculate the speed limit in kilometres per hour. (1 km = 0.6214 miles)

Accepted Answer

A) 95 km h-1 
B) 64 km h-1 
C) 80 km h-1 
D) 35 km h-1 
E) 60 km h-1 
A) 95 km h-1 
B) 64 km h-1 
C) 80 km h-1 
D) 35 km h-1 
E) 60 km h-1

Question 11

Match the following.

-kilo

Accepted Answer

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

Question 12

Give the composition of water.

Accepted Answer

A) two hydrogen atoms and two oxygen atoms 
B) one hydrogen atom and one oxygen atom 
C) two hydrogen atoms and one oxygen atom 
D) one hydrogen atom and two oxygen atoms 
A) two hydrogen atoms and two oxygen atoms 
B) one hydrogen atom and one oxygen atom 
C) two hydrogen atoms and one oxygen atom 
D) one hydrogen atom and two oxygen atoms

Question 13

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 14

Which of the following is the lowest temperature?

Accepted Answer

A) 42 °C 
B) 57 °F 
C) 318 K 
D) All of these temperatures are equal. 
A) 42 °C 
B) 57 °F 
C) 318 K 
D) All of these temperatures are equal.

Question 15

A solution has a temperature of 68 °C. What is the temperature in K?

Accepted Answer

A) 427 K 
B) 20 K 
C) 154 K 
D) 341 K 
E) 296 K 
A) 427 K 
B) 20 K 
C) 154 K 
D) 341 K 
E) 296 K

Question 16

Choose the element from the list below.

Accepted Answer

A) sodium chloride 
B) water 
C) carbon dioxide 
D) helium 
E) rust 
A) sodium chloride 
B) water 
C) carbon dioxide 
D) helium 
E) rust

Question 17

How many mg does a 433 kg sample contain?

Accepted Answer

A) 4.33 × 10-4 mg 
B) 4.33 × 107 mg 
C) 4.33 × 10-3 mg 
D) 4.33 × 106 mg 
E) 4.33 × 108 mg 
A) 4.33 × 10-4 mg 
B) 4.33 × 107 mg 
C) 4.33 × 10-3 mg 
D) 4.33 × 106 mg 
E) 4.33 × 108 mg

Question 18

Gas is sold for $1.399 per litre in Toronto. Your car needs 12.00 gallons. How much will your credit card be charged in Canadian dollars?

Accepted Answer

A) $16.79 
B) $67.15 
C) $4.44 
D) $63.54 
A) $16.79 
B) $67.15 
C) $4.44 
D) $63.54

Question 19

Second 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.

Exam 1: Units of Measurement for Physical and Chemical Change

A solution has a temperature of 18.65 °C. What is the temperature in K?

The average distance between nitrogen and oxygen atoms is 115 pm in a compound called nitric oxide. What is this distance in millimeters?

Identify the unit of measurement that is a SI base unit of measurement.

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

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

Which of the following is an example of physical change?

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

Convert 1.34 km2 to m2.

Convert 4 μm to metres.

If the speed limit is 40 miles per hour, calculate the speed limit in kilometres per hour. (1 km = 0.6214 miles)

Match the following. -kilo

Give the composition of water.

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

Which of the following is the lowest temperature?

A solution has a temperature of 68 °C. What is the temperature in K?

Choose the element from the list below.

How many mg does a 433 kg sample contain?

Gas is sold for $1.399 per litre in Toronto. Your car needs 12.00 gallons. How much will your credit card be charged in Canadian dollars?

Second is a measure of

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 Metallury

Transition Metals and Coordination Compounds

Filters

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

Convert 1.34 km² to m².