Question 1

Which one of the following statements is not correct?

Accepted Answer

A) Dry ice subliming is a physical change. 
B) Methanol burning is a chemical reaction. 
C) Sugar dissolving in water is a physical change. 
D) Bleaching your hair is a chemical change (reaction), even though it changes your physical appearance. 
E) Liquid water turning into steam is a chemical reaction. 
A) Dry ice subliming is a physical change. 
B) Methanol burning is a chemical reaction. 
C) Sugar dissolving in water is a physical change. 
D) Bleaching your hair is a chemical change (reaction), even though it changes your physical appearance. 
E) Liquid water turning into steam is a chemical reaction.

Question 2

Which of the following is not a chemical property of chlorine?

Accepted Answer

A) reduction by water to form HCl and dioxygen 
B) decomposition to yield two chlorine radicals upon heating 
C) freezing at   102   C 
D) reaction with methane produces chloromethane 
E) conversion to sodium chloride by addition of sodium metal 
A) reduction by water to form HCl and dioxygen 
B) decomposition to yield two chlorine radicals upon heating 
C) freezing at   102   C 
D) reaction with methane produces chloromethane 
E) conversion to sodium chloride by addition of sodium metal

Question 3

In 1 second, light can travel 2.998   108 m. How many inches does light travel in 1 femtosecond? (1 fs   10-15 s, 1 inch   2.54 cm exactly)

Accepted Answer

A) 1180 in 
B) 11.80 in 
C) 1.180 in 
D) 1.180   10-5 in 
E) 1.180   10-7 in 
A) 1180 in 
B) 11.80 in 
C) 1.180 in 
D) 1.180   10-5 in 
E) 1.180   10-7 in

Question 4

Which of the following is not a homogeneous mixture?

Accepted Answer

A) vinegar 
B) Italian salad dressing 
C) a can of soda 
D) antifreeze 
E) ketchup 
A) vinegar 
B) Italian salad dressing 
C) a can of soda 
D) antifreeze 
E) ketchup

Question 5

Which diagram depicts the process of sublimation (an asterisk denotes the initial phase of the substance)?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 6

A significant difference in boiling points of two liquids could provide the basis for separation by what physical method?

Accepted Answer

A) distillation 
B) extraction 
C) filtration 
D) recrystalization 
E) chromatography 
A) distillation 
B) extraction 
C) filtration 
D) recrystalization 
E) chromatography

Question 7

A gas forming a liquid is called ________

Accepted Answer

A) condensation. 
B) deposition. 
C) melting. 
D) freezing. 
E) vaporization. 
A) condensation. 
B) deposition. 
C) melting. 
D) freezing. 
E) vaporization.

Question 8

The summit of Mt. Humphreys, the highest point in Arizona, is 12,600 ft. How many meters is this? (1 m   1.0936 yd, 1 yd   3 ft exactly)

Accepted Answer

A) 4,593 m 
B) 3,841 m 
C) 34,565 m 
D) 41,338 m 
E) 37,800 m 
A) 4,593 m 
B) 3,841 m 
C) 34,565 m 
D) 41,338 m 
E) 37,800 m

Question 9

What would you report for the total mass of three samples weighing 106.2 g, 33.15 g, and 0.028 g?

Accepted Answer

A) 139 g 
B) 139.3 g 
C) 139.4 g 
D) 139.38 g 
E) 139.378 g 
A) 139 g 
B) 139.3 g 
C) 139.4 g 
D) 139.38 g 
E) 139.378 g

Question 10

What change of state is represented by the following diagram?

Accepted Answer

A) freezing 
B) sublimation 
C) deposition 
D) condensation 
E) melting 
A) freezing 
B) sublimation 
C) deposition 
D) condensation 
E) melting

Question 11

A heterogeneous mixture ________

Accepted Answer

A) can only be separated into its components by chemical methods. 
B) involves substances solely in the gas phase. 
C) has non-uniform sample composition. 
D) exclusively refers to substances in the same phase. 
E) is also called a solution. 
A) can only be separated into its components by chemical methods. 
B) involves substances solely in the gas phase. 
C) has non-uniform sample composition. 
D) exclusively refers to substances in the same phase. 
E) is also called a solution.

Question 12

Atoms are to molecules as ________

Accepted Answer

A) a country to a state or province. 
B) soda is to orange juice. 
C) cars are to trucks. 
D) a washer is to a dryer. 
E) letters are to words. 
A) a country to a state or province. 
B) soda is to orange juice. 
C) cars are to trucks. 
D) a washer is to a dryer. 
E) letters are to words.

Question 13

The symbol and name corresponding to the factor 10-6 is ________

Accepted Answer

A) f, femto. 
B) p, pico. 
C) n, nano. 
D) (  , micro.) 
E) m, milli. 
A) f, femto. 
B) p, pico. 
C) n, nano. 
D) (  , micro.) 
E) m, milli.

Question 14

Which of the following is a base SI unit?

Accepted Answer

A) g 
B) mmol 
C) (  C.) 
D) s 
E) cm 
A) g 
B) mmol 
C) (  C.) 
D) s 
E) cm

Question 15

A temperature of 78   F was recorded yesterday. The forecasted high for today is predicted to be above this temperature. Which of the following could be the expected high temperature?

Accepted Answer

A) 21   C 
B) 24   C 
C) 29   C 
D) 273 K 
E) 290 K 
A) 21   C 
B) 24   C 
C) 29   C 
D) 273 K 
E) 290 K

Question 16

What is the temperature in   C of a reaction mixture that is at 234 K?

Accepted Answer

A) (  507   
C)  
B) (  39   
C)  
C) 39   C 
D) 234   C 
E) 507   C 
A) (  507   
C)  
B) (  39   
C)  
C) 39   C 
D) 234   C 
E) 507   C

Question 17

Which of the following is not a pure substance?

Accepted Answer

A) air 
B) nitrogen gas 
C) oxygen gas 
D) argon gas 
E) table salt (sodium chloride) 
A) air 
B) nitrogen gas 
C) oxygen gas 
D) argon gas 
E) table salt (sodium chloride)

Question 18

The law of constant composition states that ________

Accepted Answer

A) compounds such as NO2 and SO2 have identical chemical properties. 
B) the elements forming a particular compound always combine in the same proportions. 
C) nitrogen and oxygen can combine to form NO or NO2. 
D) compounds such as NO and NO2 have identical chemical properties. 
E) only one compound can be produced when two elements combine. 
A) compounds such as NO2 and SO2 have identical chemical properties. 
B) the elements forming a particular compound always combine in the same proportions. 
C) nitrogen and oxygen can combine to form NO or NO2. 
D) compounds such as NO and NO2 have identical chemical properties. 
E) only one compound can be produced when two elements combine.

Question 19

Which temperature is below 300 K?

Accepted Answer

A) 28   C 
B) 30   C 
C) 75   F 
D) 85   F 
E) All the temperatures are below 300 K. 
A) 28   C 
B) 30   C 
C) 75   F 
D) 85   F 
E) All the temperatures are below 300 K.

Question 20

An example of a chemical property of formaldehyde (CH2O) is ________

Accepted Answer

A) it is flammable. 
B) it has a density of 1.09 g/mL. 
C) it is colorless. 
D) it dissolves in water. 
E) it is a gas at room temperature. 
A) it is flammable. 
B) it has a density of 1.09 g/mL. 
C) it is colorless. 
D) it dissolves in water. 
E) it is a gas at room temperature.

Exam 1: Matter and Energy: The Origin of the Universe

Which one of the following statements is not correct?

Which of the following is not a chemical property of chlorine?

In 1 second, light can travel 2.998 108 m. How many inches does light travel in 1 femtosecond? (1 fs 10-15 s, 1 inch 2.54 cm exactly)

Which of the following is not a homogeneous mixture?

Which diagram depicts the process of sublimation (an asterisk denotes the initial phase of the substance)?

A significant difference in boiling points of two liquids could provide the basis for separation by what physical method?

A gas forming a liquid is called ________

The summit of Mt. Humphreys, the highest point in Arizona, is 12,600 ft. How many meters is this? (1 m 1.0936 yd, 1 yd 3 ft exactly)

What would you report for the total mass of three samples weighing 106.2 g, 33.15 g, and 0.028 g?

What change of state is represented by the following diagram?

A heterogeneous mixture ________

Atoms are to molecules as ________

The symbol and name corresponding to the factor 10-6 is ________

Which of the following is a base SI unit?

A temperature of 78 F was recorded yesterday. The forecasted high for today is predicted to be above this temperature. Which of the following could be the expected high temperature?

What is the temperature in C of a reaction mixture that is at 234 K?

Which of the following is not a pure substance?

The law of constant composition states that ________

Which temperature is below 300 K?

An example of a chemical property of formaldehyde (CH2O) is ________

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

In 1 second, light can travel 2.998 10⁸ m. How many inches does light travel in 1 femtosecond? (1 fs 10^-15 s, 1 inch 2.54 cm exactly)

The symbol and name corresponding to the factor 10^-6 is ________

An example of a chemical property of formaldehyde (CH₂O) is ________