Question 1

What type of change alters the appearance,but not the composition or identity of the substance undergoing the change?

Accepted Answer

A) theoretical 
B) physical 
C) analytical 
D) chemical 
E) nuclear 
A) theoretical 
B) physical 
C) analytical 
D) chemical 
E) nuclear

Question 2

A student measures the mass of three separate samples of a solid: 104.45 g,0.838 g,and 46 g.If the student mixes all three samples together,how should the total mass be properly reported?

Accepted Answer

A) 151.288 
B) 151.28 
C) 151.29 
D) 151 
E) 1.5 × 102 
A) 151.288 
B) 151.28 
C) 151.29 
D) 151 
E) 1.5 × 102

Question 3

Air is a/an

Accepted Answer

A) element. 
B) compound. 
C) mixture. 
D) molecule. 
E) pure substance. 
A) element. 
B) compound. 
C) mixture. 
D) molecule. 
E) pure substance.

Question 4

The area of a rectangle is determined by the formula: area = length × width.If a rectangle has a length of 32.6 cm and a width of 72.6 cm,what is the area of the rectangle to the correct number of significant figures?

Accepted Answer

A) 2,400 cm2 
B) 2,370 cm2 
C) 2,367 cm2 
D) 2,366.8 cm2 
E) 2,366.76 cm2 
A) 2,400 cm2 
B) 2,370 cm2 
C) 2,367 cm2 
D) 2,366.8 cm2 
E) 2,366.76 cm2

Question 5

Each piece of data is the individual result of a single measurement.

Accepted Answer

A) True 
 B)False

Question 6

How many pounds are represented by 764.6 mg? 
[1 pound = 454 g]

Accepted Answer

A) 347.1 lb 
B) 3.471 × 108 lb 
C) 1.684 × 10-3 lb 
D) 1.684 lb 
E) 0.7646 lb 
A) 347.1 lb 
B) 3.471 × 108 lb 
C) 1.684 × 10-3 lb 
D) 1.684 lb 
E) 0.7646 lb

Question 7

How many significant figures does the number 5.06305 × 104 contain?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 9 
A) 4 
B) 5 
C) 6 
D) 7 
E) 9

Question 8

Which of the following terms best describes the sample of matter in the diagram? Note: different colored circles represent atoms of different elements.

Accepted Answer

A) homogeneous mixture 
B) pure substance 
C) heterogeneous mixture 
D) solution 
E) None of the choices are correct. 
A) homogeneous mixture 
B) pure substance 
C) heterogeneous mixture 
D) solution 
E) None of the choices are correct.

Question 9

Air has an average density of 0.001226 g/mL.What volume of air would have a mass of 1.0 lb? 
454 g = 1 pound

Accepted Answer

A) 37 mL 
B) 370 mL 
C) 557 mL 
D) 2.7 × 10−6 mL 
E) 3.7 × 102 L 
A) 37 mL 
B) 370 mL 
C) 557 mL 
D) 2.7 × 10−6 mL 
E) 3.7 × 102 L

Question 10

How should the result of the calculation below be reported using scientific notation and the proper number of significant figures? 
(4.3169 × 104)÷ (2.02 × 103)= ?

Accepted Answer

A) 2.14 × 101 
B) 2.1371 × 101 
C) 2.14 × 102 
D) 2.14 × 107 
E) 2.1371 × 109 
A) 2.14 × 101 
B) 2.1371 × 101 
C) 2.14 × 102 
D) 2.14 × 107 
E) 2.1371 × 109

Question 11

Which of the following numbers has only one significant figure?

Accepted Answer

A) 3.0 × 101 
B) 0.003 
C) 3.00 
D) 30.0 
E) All of the choices are correct. 
A) 3.0 × 101 
B) 0.003 
C) 3.00 
D) 30.0 
E) All of the choices are correct.

Question 12

What is the number 0.0062985632 written in scientific notation to three significant figures?

Accepted Answer

A) 0.006 
B) 6.00 × 10−3  
C) 6.29 × 10−3 
D) 6.299 × 10−3 
E) 6.30 × 10−3 
A) 0.006 
B) 6.00 × 10−3  
C) 6.29 × 10−3 
D) 6.299 × 10−3 
E) 6.30 × 10−3

Question 13

Which statement is FALSE?

Accepted Answer

A) Mass is an example of an extensive property. 
B) Volume is an example of an extensive property. 
C) Temperature is an example of an intensive property. 
D) An intensive property is one that does not depend upon the amount of the substance. 
E) An extensive property is synonymous with a physical property. 
A) Mass is an example of an extensive property. 
B) Volume is an example of an extensive property. 
C) Temperature is an example of an intensive property. 
D) An intensive property is one that does not depend upon the amount of the substance. 
E) An extensive property is synonymous with a physical property.

Question 14

What is the number 3,000 written in scientific notation using the proper number of significant figures?

Accepted Answer

A) 0.003 × 10−3  
B) 0.3 × 104 
C) 3 × 103 
D) 3 × 10−3 
E) 3.000 × 103 
A) 0.003 × 10−3  
B) 0.3 × 104 
C) 3 × 103 
D) 3 × 10−3 
E) 3.000 × 103

Question 15

What statement best describes an intensive property?

Accepted Answer

A) A property of a substance that does not depend on the quantity of the substance present. 
B) A property of a substance that depends on the quantity of the substance present. 
C) A property of a substance that depends on the mass of the substance,but not the volume of the substance. 
D) A property of a substance that depends on the physical state (solid,liquid,or gas)of the substance. 
E) A property of a substance that changes based on the mass of the material that is present. 
A) A property of a substance that does not depend on the quantity of the substance present. 
B) A property of a substance that depends on the quantity of the substance present. 
C) A property of a substance that depends on the mass of the substance,but not the volume of the substance. 
D) A property of a substance that depends on the physical state (solid,liquid,or gas)of the substance. 
E) A property of a substance that changes based on the mass of the material that is present.

Question 16

Conversion of ice to liquid water or liquid water to steam is an example of what kind of change?

Accepted Answer

A) physical 
B) chemical 
C) molecular 
D) analytical 
E) Both physical and chemical are correct. 
A) physical 
B) chemical 
C) molecular 
D) analytical 
E) Both physical and chemical are correct.

Question 17

According to the Study Cycle,what is the recommended study session frequency?

Accepted Answer

A) 1 long,intense session per week 
B) 1-2 long,intense session per day 
C) 3-5 short,intense sessions per week 
D) 3-5 short,intense sessions per day 
E) None of these choices are correct. 
A) 1 long,intense session per week 
B) 1-2 long,intense session per day 
C) 3-5 short,intense sessions per week 
D) 3-5 short,intense sessions per day 
E) None of these choices are correct.

Question 18

Hypotheses are not acceptable in the scientific method.

Accepted Answer

A) True 
 B)False

Question 19

Provide the answer to the following problem using scientific notation and the proper number of significant digits: 
(6.00 × 10-2)(3.00 × 10-4)= ?

Accepted Answer

A) 1.8 × 10-5 
B) 1.80 ×10-5 
C) 1.80 × 10-4 
D) 18.00 × 10-4 
E) 2 × 10-5 
A) 1.8 × 10-5 
B) 1.80 ×10-5 
C) 1.80 × 10-4 
D) 18.00 × 10-4 
E) 2 × 10-5

Question 20

What is a hypothesis?

Accepted Answer

A) a fact that results from extensive experimentation and testing 
B) the summary of a large quantity of information 
C) the result of a single measurement or observation 
D) an attempt to explain an observation,or a series of observations 
E) an observation of a chemical reaction 
A) a fact that results from extensive experimentation and testing 
B) the summary of a large quantity of information 
C) the result of a single measurement or observation 
D) an attempt to explain an observation,or a series of observations 
E) an observation of a chemical reaction

Exam 1: Chemistry - Methods and Measurement

What type of change alters the appearance,but not the composition or identity of the substance undergoing the change?

A student measures the mass of three separate samples of a solid: 104.45 g,0.838 g,and 46 g.If the student mixes all three samples together,how should the total mass be properly reported?

Air is a/an

The area of a rectangle is determined by the formula: area = length × width.If a rectangle has a length of 32.6 cm and a width of 72.6 cm,what is the area of the rectangle to the correct number of significant figures?

Each piece of data is the individual result of a single measurement.

How many pounds are represented by 764.6 mg? [1 pound = 454 g]

How many significant figures does the number 5.06305 × 104 contain?

Which of the following terms best describes the sample of matter in the diagram? Note: different colored circles represent atoms of different elements.

Air has an average density of 0.001226 g/mL.What volume of air would have a mass of 1.0 lb? 454 g = 1 pound

How should the result of the calculation below be reported using scientific notation and the proper number of significant figures? (4.3169 × 104)÷ (2.02 × 103)= ?

Which of the following numbers has only one significant figure?

What is the number 0.0062985632 written in scientific notation to three significant figures?

Which statement is FALSE?

What is the number 3,000 written in scientific notation using the proper number of significant figures?

What statement best describes an intensive property?

Conversion of ice to liquid water or liquid water to steam is an example of what kind of change?

According to the Study Cycle,what is the recommended study session frequency?

Hypotheses are not acceptable in the scientific method.

Provide the answer to the following problem using scientific notation and the proper number of significant digits: (6.00 × 10-2)(3.00 × 10-4)= ?

What is a hypothesis?

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Lipids and Their Functions in Biochemical Systems

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

How many significant figures does the number 5.06305 × 10⁴ contain?

How should the result of the calculation below be reported using scientific notation and the proper number of significant figures? (4.3169 × 10⁴)÷ (2.02 × 10³)= ?

Provide the answer to the following problem using scientific notation and the proper number of significant digits: (6.00 × 10^-2)(3.00 × 10^-4)= ?