Question 1

What is the chemical formula for calcium hydroxide?

Accepted Answer

A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2 
A) CaH2 
B) CaOH 
C) CaOH2 
D) Ca(OH)2

Question 2

In which compound does carbon have an oxidation state of zero?

Accepted Answer

A) C2H2  
B) CH2O 
C) CH3OH 
D) Na2CO3  
E) CO2  
A) C2H2  
B) CH2O 
C) CH3OH 
D) Na2CO3  
E) CO2

Question 3

What is the formula of sodium bicarbonate?

Accepted Answer

A) NaHCO3 
B) Na2CO3 
C) NaHCO2 
D) Na2C2 
E) Na2C2O4 
A) NaHCO3 
B) Na2CO3 
C) NaHCO2 
D) Na2C2 
E) Na2C2O4

Question 4

A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass.What mass of H will be found in a 27.000 g sample of water?

Accepted Answer

A) 3.021 g 
B) 1.511 g 
C) 2.413 g 
D) 1.206 g 
E) 23.98 g 
A) 3.021 g 
B) 1.511 g 
C) 2.413 g 
D) 1.206 g 
E) 23.98 g

Question 5

A compound is found to have the following percent composition by mass: 38.7% K,13.8% N,47.5% O.What is the empirical formula of the compound?

Accepted Answer

A) KNO3  
B) KNO2  
C) K2NO2  
D) K2NO3  
E) K2N2O3  
A) KNO3  
B) KNO2  
C) K2NO2  
D) K2NO3  
E) K2N2O3

Question 6

Nitrogen forms at least three stable oxides: N2O,NO,and NO2.How many grams of nitrogen reacts with 32 grams of oxygen to form NO?

Accepted Answer

A) 16 grams 
B) 28 grams 
C) 14 grams 
D) 32 grams 
E) 8 grams 
A) 16 grams 
B) 28 grams 
C) 14 grams 
D) 32 grams 
E) 8 grams

Question 7

How many hydrogen atoms are there in 12.4 g of Al2(HPO4)3?

Accepted Answer

A) 6.55 × 1022 H atoms 
B) 1.09 × 1022 H atoms 
C) 6.07 × 1022 H atoms 
D) 1.32 × 1023 H atoms 
E) 4.39 × 1022 H atoms 
A) 6.55 × 1022 H atoms 
B) 1.09 × 1022 H atoms 
C) 6.07 × 1022 H atoms 
D) 1.32 × 1023 H atoms 
E) 4.39 × 1022 H atoms

Question 8

The oxidation state of oxygen in oxygen difluoride,OF2,is ________.

Accepted Answer

A) -1 
B) +1 
C) -2 
D) +2 
E) - 1/2 
A) -1 
B) +1 
C) -2 
D) +2 
E) - 1/2

Question 9

What is the mass of a single fluorine molecule,F2?

Accepted Answer

A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g 
A) 3.155 × 10-23 g 
B) 6.310 × 10-23 g 
C) 19.00 g 
D) 38.00 g

Question 10

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

Accepted Answer

A) 0.933 g 
B) 10.0 g 
C) 23.3 g 
D) 146 g 
A) 0.933 g 
B) 10.0 g 
C) 23.3 g 
D) 146 g

Question 11

Combustion analysis of a 22.0 mg sample of the painkiller morphine produced 13.2 mg of water.What is the percentage by mass of hydrogen in morphine?

Accepted Answer

A) 6.71% 
B) 3.36% 
C) 13.4% 
D) 60.0% 
A) 6.71% 
B) 3.36% 
C) 13.4% 
D) 60.0%

Question 12

A mole of the substance water,H2O,refers to:

Accepted Answer

A) 12.0000 g H2O 
B) one H2O molecule 
C) 6.02 × 1023 g H2O 
D) 6.02 × 1023 H2O molecules 
E) 6.02 × 1023 atoms of H and O 
A) 12.0000 g H2O 
B) one H2O molecule 
C) 6.02 × 1023 g H2O 
D) 6.02 × 1023 H2O molecules 
E) 6.02 × 1023 atoms of H and O

Question 13

Which of the following elements has the LEAST tendency to form an ion?

Accepted Answer

A) Ca 
B) K 
C) Kr 
D) Se 
A) Ca 
B) K 
C) Kr 
D) Se

Question 14

What is the molar mass of chlorine gas?

Accepted Answer

A) 35.5 g mol-1 
B) 71.0 g mol-1 
C) 6.02 × 1023 g mol-1 
D) 1.20 × 1023 g mol-1 
A) 35.5 g mol-1 
B) 71.0 g mol-1 
C) 6.02 × 1023 g mol-1 
D) 1.20 × 1023 g mol-1

Question 15

Choose the INCORRECT name formula combination.

Accepted Answer

A) Fe2O3 iron(III)oxide 
B) H2SO3 sulfurous acid 
C) NH4ClO3 ammonium chlorate 
D) CaH2 calcium hydride 
E) SiO2 silicon oxide 
A) Fe2O3 iron(III)oxide 
B) H2SO3 sulfurous acid 
C) NH4ClO3 ammonium chlorate 
D) CaH2 calcium hydride 
E) SiO2 silicon oxide

Question 16

Which of the following has the smallest mass?

Accepted Answer

A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2 
A) 3.50 × 1023 molecules of I2 
B) 85.0 g of Cl2 
C) 2.50 mol of F2 
D) 0.050 kg of Br2

Question 17

Which of the following substances contains the greatest number of atoms?

Accepted Answer

A) 5 mol H2O 
B) 6 mol CS2  
C) 3 mol NaNO3  
D) 2 mol NH4OH 
E) 6 mol NaH 
A) 5 mol H2O 
B) 6 mol CS2  
C) 3 mol NaNO3  
D) 2 mol NH4OH 
E) 6 mol NaH

Question 18

Chemical nomenclature is a systematic way of assigning names to chemical compounds.

Accepted Answer

A) True 
 B)False

Question 19

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 40.0 g of calcium fluoride?

Accepted Answer

A) 2.27 g 
B) 7.70 g 
C) 15.0 g 
D) 20.5 g 
A) 2.27 g 
B) 7.70 g 
C) 15.0 g 
D) 20.5 g

Question 20

How many grams of K are found in 1.00 × 102 g of K2Cr2O7?

Accepted Answer

A) 18.3 g 
B) 36.5 g 
C) 53.2 g 
D) 13.3 g 
E) 26.6 g 
A) 18.3 g 
B) 36.5 g 
C) 53.2 g 
D) 13.3 g 
E) 26.6 g

Exam 3: Chemical Compounds

What is the chemical formula for calcium hydroxide?

In which compound does carbon have an oxidation state of zero?

What is the formula of sodium bicarbonate?

A 2.000 g sample of water contains 11.19% H by mass and 88.81% O by mass.What mass of H will be found in a 27.000 g sample of water?

A compound is found to have the following percent composition by mass: 38.7% K,13.8% N,47.5% O.What is the empirical formula of the compound?

Nitrogen forms at least three stable oxides: N2O,NO,and NO2.How many grams of nitrogen reacts with 32 grams of oxygen to form NO?

How many hydrogen atoms are there in 12.4 g of Al2(HPO4)3?

The oxidation state of oxygen in oxygen difluoride,OF2,is ________.

What is the mass of a single fluorine molecule,F2?

What mass of phosphorus pentafluoride,PF5,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF2?

Combustion analysis of a 22.0 mg sample of the painkiller morphine produced 13.2 mg of water.What is the percentage by mass of hydrogen in morphine?

A mole of the substance water,H2O,refers to:

Which of the following elements has the LEAST tendency to form an ion?

What is the molar mass of chlorine gas?

Choose the INCORRECT name formula combination.

Which of the following has the smallest mass?

Which of the following substances contains the greatest number of atoms?

Chemical nomenclature is a systematic way of assigning names to chemical compounds.

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 40.0 g of calcium fluoride?

How many grams of K are found in 1.00 × 102 g of K2Cr2O7?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

Filters

Nitrogen forms at least three stable oxides: N₂O,NO,and NO₂.How many grams of nitrogen reacts with 32 grams of oxygen to form NO?

How many hydrogen atoms are there in 12.4 g of Al₂(HPO₄)₃?

The oxidation state of oxygen in oxygen difluoride,OF₂,is ________.

What is the mass of a single fluorine molecule,F₂?

What mass of phosphorus pentafluoride,PF₅,has the same number of fluorine atoms as 25.0 g of oxygen difluoride,OF₂?

A mole of the substance water,H₂O,refers to:

How many grams of K are found in 1.00 × 10² g of K₂Cr₂O₇?