Question 1

If an automobile gets 24.5 miles to the gallon and the cost of gasoline is $2.75 a gallon,how much will it cost to drive 975 km?

Accepted Answer

The answer of If an automobile gets 24.5 miles to...

Question 2

What temperature is -10.°C on the Fahrenheit scale?

Accepted Answer

A) 263°F 
B) 26°F 
C) 14°F 
D) -6°F 
E) -18°F 
A) 263°F 
B) 26°F 
C) 14°F 
D) -6°F 
E) -18°F

Question 3

What is the mass of 30.0 mL of a solution with a density of 1.60 g/mL?

Accepted Answer

A) 53.3 g 
B) 48.0 g 
C) 31.6 g 
D) 18.8 g 
E) none of the above 
A) 53.3 g 
B) 48.0 g 
C) 31.6 g 
D) 18.8 g 
E) none of the above

Question 4

A gas at 25°C exactly fills a container previously determined to have a volume of 1.05 × 103 cm3.The container plus gas are weighed and found to have a mass of 837.6 g.The container,when emptied of all gas,has a mass of 836.2 g.What is the density of the gas at 25°C?

Accepted Answer

Question 5

Which chemical symbol represents a metallic element?

Accepted Answer

A) Ar 
B) Br 
C) Ca 
D) H 
E) P 
A) Ar 
B) Br 
C) Ca 
D) H 
E) P

Question 6

An analysis showed a sample to contain 0.00471 grams of lead.How many micrograms is this?

Accepted Answer

A) 0.471 μg 
B) 4.71 × 103 μg 
C) 4.71 × 106 μg 
D) 4.71 × 10-2 μg 
E) 4.71 × 10-6 μg 
A) 0.471 μg 
B) 4.71 × 103 μg 
C) 4.71 × 106 μg 
D) 4.71 × 10-2 μg 
E) 4.71 × 10-6 μg

Question 7

What element is represented by the chemical symbol Ag?

Accepted Answer

A) argon 
B) arsenic 
C) gold 
D) mercury 
E) silver 
A) argon 
B) arsenic 
C) gold 
D) mercury 
E) silver

Question 8

The units most likely to be used to measure the amount of alcohol to be added to a small test tube are

Accepted Answer

A) g. 
B) mL. 
C) cm. 
D) kg. 
E) L. 
A) g. 
B) mL. 
C) cm. 
D) kg. 
E) L.

Question 9

A laboratory technician reports that the mass of a growth removed from a patient is 274.06 g.How many significant figures does this measurement contain?

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) none of the above 
A) 2 
B) 3 
C) 4 
D) 5 
E) none of the above

Question 10

Consider the chemical reaction described as
Mercury(II)oxide  
Mercury + oxygen.
Identify the reactant(s)in this example.

Accepted Answer

A) heat 
B) mercury + oxygen 
C) mercury(II)oxide 
D) mercury 
E) oxygen 
A) heat 
B) mercury + oxygen 
C) mercury(II)oxide 
D) mercury 
E) oxygen

Question 11

How many inches are contained in 25.4 cm?

Accepted Answer

A) 100 inches 
B) 64.5 inches 
C) 25.4 inches 
D) 10.0 inches 
E) 0.10 inches 
A) 100 inches 
B) 64.5 inches 
C) 25.4 inches 
D) 10.0 inches 
E) 0.10 inches

Question 12

Which of the following is an element?

Accepted Answer

A) fire 
B) iron 
C) salt 
D) water 
E) wine 
A) fire 
B) iron 
C) salt 
D) water 
E) wine

Question 13

How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?

Accepted Answer

A) 35.0 cal 
B) 70.0 cal 
C) 1.25 × 104 cal 
D) 3.50 × 104 cal 
E) 4.75 × 104 cal 
A) 35.0 cal 
B) 70.0 cal 
C) 1.25 × 104 cal 
D) 3.50 × 104 cal 
E) 4.75 × 104 cal

Question 14

An extra-strength aspirin contains 0.500 g of aspirin.How many grains is this? (1 grain = 64.8 mg)

Accepted Answer

A) 7.72 grains 
B) 13.0 grains 
C) 32.4 grains 
D) 65.3 grains 
E) 3.24 × 104 grains 
A) 7.72 grains 
B) 13.0 grains 
C) 32.4 grains 
D) 65.3 grains 
E) 3.24 × 104 grains

Question 15

What is the chemical symbol for chlorine?

Accepted Answer

A) C 
B) Ca 
C) Cl 
D) Cr 
E) Cu 
A) C 
B) Ca 
C) Cl 
D) Cr 
E) Cu

Question 16

Which of the following observations demonstrates that a solid sample is a compound?

Accepted Answer

A) It cannot be broken down into simpler substances by chemical methods. 
B) It cannot be broken down into simpler substances by physical methods. 
C) Heating the substance causes it to melt,then to boil. 
D) Heating the substance causes no visible color change. 
E) Crushing the sample does not affect its other properties. 
A) It cannot be broken down into simpler substances by chemical methods. 
B) It cannot be broken down into simpler substances by physical methods. 
C) Heating the substance causes it to melt,then to boil. 
D) Heating the substance causes no visible color change. 
E) Crushing the sample does not affect its other properties.

Question 17

Which symbol does not denote a compound?

Accepted Answer

A) CO2 
B) CCl4 
C) C2H4 
D) Cr 
E) CaCO3 
A) CO2 
B) CCl4 
C) C2H4 
D) Cr 
E) CaCO3

Question 18

Which of the following is a chemical property?

Accepted Answer

A) melting point 
B) mass 
C) flammability 
D) volume 
E) temperature 
A) melting point 
B) mass 
C) flammability 
D) volume 
E) temperature

Question 19

Which of the following is an example of matter?

Accepted Answer

A) light 
B) clothing 
C) forgiveness 
D) jealousy 
E) wisdom 
A) light 
B) clothing 
C) forgiveness 
D) jealousy 
E) wisdom

Question 20

What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures.

Accepted Answer

A) 3.722 cm 
B) 4.722 cm 
C) 7.722 cm 
D) 7.7 cm 
E) 8 cm 
A) 3.722 cm 
B) 4.722 cm 
C) 7.722 cm 
D) 7.7 cm 
E) 8 cm

Exam 1: Matter and Measurements

If an automobile gets 24.5 miles to the gallon and the cost of gasoline is $2.75 a gallon,how much will it cost to drive 975 km?

What temperature is -10.°C on the Fahrenheit scale?

What is the mass of 30.0 mL of a solution with a density of 1.60 g/mL?

A gas at 25°C exactly fills a container previously determined to have a volume of 1.05 × 103 cm3.The container plus gas are weighed and found to have a mass of 837.6 g.The container,when emptied of all gas,has a mass of 836.2 g.What is the density of the gas at 25°C?

Which chemical symbol represents a metallic element?

An analysis showed a sample to contain 0.00471 grams of lead.How many micrograms is this?

What element is represented by the chemical symbol Ag?

The units most likely to be used to measure the amount of alcohol to be added to a small test tube are

A laboratory technician reports that the mass of a growth removed from a patient is 274.06 g.How many significant figures does this measurement contain?

Consider the chemical reaction described as Mercury(II)oxide Mercury + oxygen. Identify the reactant(s)in this example.

How many inches are contained in 25.4 cm?

Which of the following is an element?

How many calories are released when 500 g of water cools from 95.0°C to 25.0°C?

An extra-strength aspirin contains 0.500 g of aspirin.How many grains is this? (1 grain = 64.8 mg)

What is the chemical symbol for chlorine?

Which of the following observations demonstrates that a solid sample is a compound?

Which symbol does not denote a compound?

Which of the following is a chemical property?

Which of the following is an example of matter?

What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures.

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

A gas at 25°C exactly fills a container previously determined to have a volume of 1.05 × 10³ cm³.The container plus gas are weighed and found to have a mass of 837.6 g.The container,when emptied of all gas,has a mass of 836.2 g.What is the density of the gas at 25°C?