Question 1

The number 0.00816 expressed correctly using scientific notation is _____ .

Accepted Answer

A) 8.16 * 102 
B) 8.16 * 103 
C) 8.16 *10-2 
D) 8.16 *10-3 
A) 8.16 * 102 
B) 8.16 * 103 
C) 8.16 *10-2 
D) 8.16 *10-3

Question 2

Suppose the speedometer in your car reads 55.0 mph.What is your speed in km/hr? (1 km = 0.621 mi.)

Accepted Answer

A) 34.1 
B) 0.029 
C) 88.6 
D) 0.011 
A) 34.1 
B) 0.029 
C) 88.6 
D) 0.011

Question 3

To convert feet to inches,you should multiply by the factor 12 in./ft.

Accepted Answer

A) True 
 B)False

Question 4

If 100 people in a town of 5,000 people own a certain color car,this represents 0.1% of the population.

Accepted Answer

A) True 
 B)False

Question 5

The melting of ice to liquid water is correctly classified as

Accepted Answer

A) a chemical change. 
B) a physical change. 
C) both a chemical and a physical change. 
D) neither a chemical nor physical change. 
A) a chemical change. 
B) a physical change. 
C) both a chemical and a physical change. 
D) neither a chemical nor physical change.

Question 6

If urine has a density of 1.08 g/mL,what would be the mass of a 125 mL urine sample?

Accepted Answer

A) 135 g 
B) 0.00864 g 
C) 116 g 
D) 125 g 
A) 135 g 
B) 0.00864 g 
C) 116 g 
D) 125 g

Question 7

Which number has the greatest number of significant digits?

Accepted Answer

A) 1.0035 
B) 17.5000 
C) 0.0000625 
D) 6.022 * 1023 
A) 1.0035 
B) 17.5000 
C) 0.0000625 
D) 6.022 * 1023

Question 8

Express the following "generic number" in scientific notation.0.0000XXX

Accepted Answer

A) XXX * 10-7 
B) X.XX *105 
C) X.XX * 10-5 
D) X.XX *10-4 
A) XXX * 10-7 
B) X.XX *105 
C) X.XX * 10-5 
D) X.XX *10-4

Question 9

Which of the following set-ups will allow you to calculate the cost of fruit in dollars per gram,if the price is given as 0.79 dollars per pound?

Accepted Answer

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

Question 10

If a sample of blood was found to have a density of 1.05 g/mL,what would be the mass of 1.000 liters of this material? Express your answer with the proper number of significant figures.

Accepted Answer

A) 1.05 * 10-3 g 
B) 1.05 * 103 g 
C) 1050 g 
D) 1.050 kg 
A) 1.05 * 10-3 g 
B) 1.05 * 103 g 
C) 1050 g 
D) 1.050 kg

Question 11

Do the following calculation.How many significant figures are justified for the answer? ______= 6.02 + 5.119 + 0.04218

Accepted Answer

A) three 
B) four 
C) five 
D) seven 
A) three 
B) four 
C) five 
D) seven

Question 12

If 13% of a class cheats on an exam and there are 93 students in the class,how many students should you recommend be expelled (to the nearest whole student)?

Accepted Answer

A) 9 
B) 10 
C) 12 
D) 15 
A) 9 
B) 10 
C) 12 
D) 15

Question 13

The density of zinc is 7.13 g/cm3.What is the mass in kilograms of a 125 cm3 cylinder of zinc?

Accepted Answer

A) 891 kg 
B) 17.5 kg 
C) 0.0175 kg 
D) 0.891 kg 
A) 891 kg 
B) 17.5 kg 
C) 0.0175 kg 
D) 0.891 kg

Question 14

To convert microliters to liters,you should multiply by 1 liter/1,000,000 microliters.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following is a chemical property of matter?

Accepted Answer

A) color 
B) density 
C) freezing point 
D) flammability 
A) color 
B) density 
C) freezing point 
D) flammability

Question 16

Ethanol (ethyl alcohol)has a density of 0.789 g/mL at 25°C.If 75.5 g of ethanol is needed for a reaction,what volume in mL should be added to the reaction container?

Accepted Answer

A) 95.7 mL 
B) 59.6 mL 
C) 0.0105 mL 
D) 78.9 mL 
A) 95.7 mL 
B) 59.6 mL 
C) 0.0105 mL 
D) 78.9 mL

Question 17

A furnace delivers 8.0 * 104 BTU per hour.How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)

Accepted Answer

A) 3.2 *10-5 kcal 
B) 3.2 * 102 kcal 
C) 2.0 * 104 kcal 
D) 2.5 * 102 kcal 
A) 3.2 *10-5 kcal 
B) 3.2 * 102 kcal 
C) 2.0 * 104 kcal 
D) 2.5 * 102 kcal

Question 18

Which of the following substances are composed of heteroatomic molecules?

Accepted Answer

A) an iron nail 
B) oxygen 
C) copper wire 
D) water 
A) an iron nail 
B) oxygen 
C) copper wire 
D) water

Question 19

Which of the following terms correctly applies to a molecule of CO2?

Accepted Answer

A) triatomic,heteroatomic 
B) polyatomic,diatomic 
C) triatomic,homoatomic 
D) diatomic,heteroatomic 
A) triatomic,heteroatomic 
B) polyatomic,diatomic 
C) triatomic,homoatomic 
D) diatomic,heteroatomic

Question 20

The metric system is a measurement system that is

Accepted Answer

A) the official system for all nations of the world. 
B) only used by a few of the nations of the world. 
C) commonly used by U.S.physical scientists. 
D) used exclusively in chemical calculations. 
A) the official system for all nations of the world. 
B) only used by a few of the nations of the world. 
C) commonly used by U.S.physical scientists. 
D) used exclusively in chemical calculations.

Exam 1: Matter, measurements, and Calculations

The number 0.00816 expressed correctly using scientific notation is _____ .

Suppose the speedometer in your car reads 55.0 mph.What is your speed in km/hr? (1 km = 0.621 mi.)

To convert feet to inches,you should multiply by the factor 12 in./ft.

If 100 people in a town of 5,000 people own a certain color car,this represents 0.1% of the population.

The melting of ice to liquid water is correctly classified as

If urine has a density of 1.08 g/mL,what would be the mass of a 125 mL urine sample?

Which number has the greatest number of significant digits?

Express the following "generic number" in scientific notation.0.0000XXX

Which of the following set-ups will allow you to calculate the cost of fruit in dollars per gram,if the price is given as 0.79 dollars per pound?

If a sample of blood was found to have a density of 1.05 g/mL,what would be the mass of 1.000 liters of this material? Express your answer with the proper number of significant figures.

Do the following calculation.How many significant figures are justified for the answer? ______= 6.02 + 5.119 + 0.04218

If 13% of a class cheats on an exam and there are 93 students in the class,how many students should you recommend be expelled (to the nearest whole student)?

The density of zinc is 7.13 g/cm3.What is the mass in kilograms of a 125 cm3 cylinder of zinc?

To convert microliters to liters,you should multiply by 1 liter/1,000,000 microliters.

Which of the following is a chemical property of matter?

Ethanol (ethyl alcohol)has a density of 0.789 g/mL at 25°C.If 75.5 g of ethanol is needed for a reaction,what volume in mL should be added to the reaction container?

A furnace delivers 8.0 * 104 BTU per hour.How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)

Which of the following substances are composed of heteroatomic molecules?

Which of the following terms correctly applies to a molecule of CO2?

The metric system is a measurement system that is

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

Chemical Reactions

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

The density of zinc is 7.13 g/cm³.What is the mass in kilograms of a 125 cm³cylinder of zinc?

A furnace delivers 8.0 * 10⁴ BTU per hour.How many kilocalories per hour is this? (hint: 1 cal = 0.00397 BTU)

Which of the following terms correctly applies to a molecule of CO₂?