Question 1

The most common element by mass percent in the human body is

Accepted Answer

A) carbon. 
B) hydrogen. 
C) oxygen 
D) sulfur. 
E) phosphorus. 
A) carbon. 
B) hydrogen. 
C) oxygen 
D) sulfur. 
E) phosphorus. C

Question 2

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. B

Question 3

Which factor determines the state of matter in which a substance exists?

Accepted Answer

A) amount 
B) color 
C) density 
D) odor 
E) temperature 
A) amount 
B) color 
C) density 
D) odor 
E) temperature E

Question 4

What is the specific heat of a metal if it takes 26.5 calories to raise the temperature of a piece weighing 50.0 g by 5.00 degrees Celsius?

Accepted Answer

A) 250 cal/g °C 
B) 133 cal/g °C 
C) 6.63 cal/g °C 
D) 1.89 cal/g °C 
E) 0.106 cal/g °C 
A) 250 cal/g °C 
B) 133 cal/g °C 
C) 6.63 cal/g °C 
D) 1.89 cal/g °C 
E) 0.106 cal/g °C

Question 5

Xylene,a compound with the formula C8H10,is composed of

Accepted Answer

A) any combination of atoms of carbon and hydrogen in a four to five ratio. 
B) eight atoms of carbon and ten atoms of hydrogen. 
C) eight atoms of calcium and ten atoms of helium. 
D) ten atoms of carbon and eight atoms of hydrogen. 
E) any combination of atoms of carbon and hydrogen that add up to 18 total. 
A) any combination of atoms of carbon and hydrogen in a four to five ratio. 
B) eight atoms of carbon and ten atoms of hydrogen. 
C) eight atoms of calcium and ten atoms of helium. 
D) ten atoms of carbon and eight atoms of hydrogen. 
E) any combination of atoms of carbon and hydrogen that add up to 18 total.

Question 6

What temperature is 75°F on the Kelvin scale?

Accepted Answer

A) 24 K 
B) 43 K 
C) 215 K 
D) 297 K 
E) 348 K 
A) 24 K 
B) 43 K 
C) 215 K 
D) 297 K 
E) 348 K

Question 7

Which of the following is an indication that a chemical reaction has taken place?

Accepted Answer

A) change in color 
B) production of a gas 
C) release of heat 
D) formation of a solid 
E) all of the above 
A) change in color 
B) production of a gas 
C) release of heat 
D) formation of a solid 
E) all of the above

Question 8

Calculate the density of cyclohexane if a 50.0 g sample has a volume of 64.3 mL.

Accepted Answer

A) 114.3 g/mL 
B) 14.3 g/mL 
C) 1.29 g/mL 
D) 0.778 g/mL 
E) 0.322 g/mL 
A) 114.3 g/mL 
B) 14.3 g/mL 
C) 1.29 g/mL 
D) 0.778 g/mL 
E) 0.322 g/mL

Question 9

What temperature is 325 K on the Celsius scale?

Accepted Answer

A) 52°C 
B) 126°C 
C) 344°C 
D) 598°C 
E) 617°C 
A) 52°C 
B) 126°C 
C) 344°C 
D) 598°C 
E) 617°C

Question 10

The SI unit for volume is ________ and the metric unit for volume is ________.

Accepted Answer

A) cc;L 
B) L;m3 
C) m3;L 
D) mL;cc 
E) m3;cm3 
A) cc;L 
B) L;m3 
C) m3;L 
D) mL;cc 
E) m3;cm3

Question 11

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 12

What element is represented by the chemical symbol K?

Accepted Answer

A) kaolin 
B) phosphorus 
C) potassium 
D) silver 
E) sodium 
A) kaolin 
B) phosphorus 
C) potassium 
D) silver 
E) sodium

Question 13

Identify the product(s)in the following reaction:
Calcium carbonate → calcium oxide + carbon dioxide

Accepted Answer

A) calcium carbonate 
B) calcium oxide + carbon dioxide 
C) calcium carbonate + calcium oxide 
D) carbon dioxide + calcium carbonate 
E) calcium carbonate + calcium oxide + carbon dioxide 
A) calcium carbonate 
B) calcium oxide + carbon dioxide 
C) calcium carbonate + calcium oxide 
D) carbon dioxide + calcium carbonate 
E) calcium carbonate + calcium oxide + carbon dioxide

Question 14

Why is the number 273.15 (and not some other value)used in the formula for converting between Celsius and Kelvin temperatures?

Accepted Answer

This value compensates for the fact that

Question 15

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 16

List and describe two differences between pure substances and mixtures.

Accepted Answer

1.The composition of a pure substance is

Question 17

The abbreviation for the metric unit used to measure mass is

Accepted Answer

A) g 
B) g/cm3 
C) K 
D) L 
E) m 
A) g 
B) g/cm3 
C) K 
D) L 
E) m

Question 18

How many centimeters are there in one kilometer?

Accepted Answer

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

Question 19

Each symbol denotes an element except

Accepted Answer

A) Co. 
B) CO. 
C) Cu. 
D) C. 
E) Cl. 
A) Co. 
B) CO. 
C) Cu. 
D) C. 
E) Cl.

Question 20

A 35.0 mL sample of a liquid weighs 27.2 g.What is the density of the liquid?

Accepted Answer

A) 62.2 g/mL 
B) 7.80 g/mL 
C) 1.29 g/mL 
D) 0.952 g/mL 
E) 0.777 g/mL 
A) 62.2 g/mL 
B) 7.80 g/mL 
C) 1.29 g/mL 
D) 0.952 g/mL 
E) 0.777 g/mL

Exam 1: Matter and Measurements

The most common element by mass percent in the human body is

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

Which factor determines the state of matter in which a substance exists?

What is the specific heat of a metal if it takes 26.5 calories to raise the temperature of a piece weighing 50.0 g by 5.00 degrees Celsius?

Xylene,a compound with the formula C8H10,is composed of

What temperature is 75°F on the Kelvin scale?

Which of the following is an indication that a chemical reaction has taken place?

Calculate the density of cyclohexane if a 50.0 g sample has a volume of 64.3 mL.

What temperature is 325 K on the Celsius scale?

The SI unit for volume is ________ and the metric unit for volume is ________.

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

What element is represented by the chemical symbol K?

Identify the product(s)in the following reaction: Calcium carbonate → calcium oxide + carbon dioxide

Why is the number 273.15 (and not some other value)used in the formula for converting between Celsius and Kelvin temperatures?

Which of the following is an element?

List and describe two differences between pure substances and mixtures.

The abbreviation for the metric unit used to measure mass is

How many centimeters are there in one kilometer?

Each symbol denotes an element except

A 35.0 mL sample of a liquid weighs 27.2 g.What is the density of the liquid?

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

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipids

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

Xylene,a compound with the formula C₈H₁₀,is composed of

The SI unit for volume is and the metric unit for volume is .