Question 1

Apple juice is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. D

Question 2

A sample of pure lithium carbonate contains 18.8% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Accepted Answer

A) 9)40% 
B) 18.8% 
C) 37.6% 
D) 75.2% 
A) 9)40% 
B) 18.8% 
C) 37.6% 
D) 75.2% B

Question 3

Which element can form more than one kind of monatomic ion?

Accepted Answer

A) Ca 
B) Cl 
C) Cr 
D) Cs 
A) Ca 
B) Cl 
C) Cr 
D) Cs C

Question 4

Use the periodic table below to answer the following questions.  
-Which is the correct formula of the binary fluoride of element A?

Accepted Answer

A) AF2 
B) AF3 
C) AF5 
D) AF6 
A) AF2 
B) AF3 
C) AF5 
D) AF6

Question 5

Gold is an example of

Accepted Answer

A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture. 
A) a compound. 
B) an element. 
C) a heterogeneous mixture. 
D) a homogeneous mixture.

Question 6

Methane and oxygen react to form carbon dioxide and water.What mass of water is formed if 3.2 g of methane reacts with 12.8 g of oxygen to produce 8.8 g of carbon dioxide?

Accepted Answer

A) 7)2 g 
B) 8)8 g 
C) 14.8 g 
D) 16.0 g 
A) 7)2 g 
B) 8)8 g 
C) 14.8 g 
D) 16.0 g

Question 7

Use the periodic table below to answer the following questions.  
-Which elements commonly form anions?

Accepted Answer

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

Question 8

In addition to a beta particle,what is the other product of beta decay of  
?

Accepted Answer

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

Question 9

Which subatomic particle has the smallest mass?

Accepted Answer

A) a proton 
B) a neutron 
C) an electron 
D) an alpha particle 
A) a proton 
B) a neutron 
C) an electron 
D) an alpha particle

Question 10

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 11

The observation that hydrogen and oxygen can react to form two compounds with different chemical and physical properties,one having an O:H mass ratio = 8:1 and the other having an O:H mass ratio = 16:1 is consistent with the law of

Accepted Answer

A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions. 
A) definite proportions. 
B) energy conservation. 
C) mass conservation. 
D) multiple proportions.

Question 12

KH2PO4 is

Accepted Answer

A) hydropotassium phosphate. 
B) potassium dihydrogen phosphate. 
C) potassium diphosphate. 
D) potassium hydrogen(II)phosphate. 
A) hydropotassium phosphate. 
B) potassium dihydrogen phosphate. 
C) potassium diphosphate. 
D) potassium hydrogen(II)phosphate.

Question 13

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions.  
-Which drawing represents the ionic compound CaCl2?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 14

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

Accepted Answer

A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4) 
A) only drawings (2)and (3) 
B) only drawings (2)and (4) 
C) only drawings (3)and (4) 
D) drawings (2),(3),and (4)

Question 15

What is the chemical formula for magnesium hydride?

Accepted Answer

A) MgH2 
B) MgOH 
C) MgOH2 
D) Mg(OH)2 
A) MgH2 
B) MgOH 
C) MgOH2 
D) Mg(OH)2

Question 16

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents an ionic compound at room temperature and a pressure of 1 atm?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
D) drawing (d)

Question 17

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 45.0 g of calcium fluoride?

Accepted Answer

A) 2)56 g 
B) 7)70 g 
C) 15.0 g 
D) 23.1 g 
A) 2)56 g 
B) 7)70 g 
C) 15.0 g 
D) 23.1 g

Question 18

What is the identity of element Q if the ion Q2+ contains 10 electrons?

Accepted Answer

A) C 
B) O 
C) Ne 
D) Mg 
A) C 
B) O 
C) Ne 
D) Mg

Question 19

Which of the following statements about gamma radiation is false?

Accepted Answer

A) It almost always accompanies alpha or beta emission. 
B) It is a mechanism to release excess energy in the nucleus. 
C) Gamma rays are high energy photons. 
D) The mass number decreases by one with each gamma emitted. 
A) It almost always accompanies alpha or beta emission. 
B) It is a mechanism to release excess energy in the nucleus. 
C) Gamma rays are high energy photons. 
D) The mass number decreases by one with each gamma emitted.

Question 20

Which of the following is a part of Dalton's atomic theory?

Accepted Answer

A) Atoms are rearranged but not changed during a chemical reaction. 
B) Atoms break down during radioactive decay. 
C) Atoms contain protons,neutrons,and electrons. 
D) Isotopes of the same element have different masses. 
A) Atoms are rearranged but not changed during a chemical reaction. 
B) Atoms break down during radioactive decay. 
C) Atoms contain protons,neutrons,and electrons. 
D) Isotopes of the same element have different masses.

Exam 2: Atoms, molecules, and Ions

Apple juice is an example of

A sample of pure lithium carbonate contains 18.8% lithium by mass.What is the % lithium by mass in a sample of pure lithium carbonate that has twice the mass of the first sample?

Which element can form more than one kind of monatomic ion?

Use the periodic table below to answer the following questions. -Which is the correct formula of the binary fluoride of element A?

Gold is an example of

Methane and oxygen react to form carbon dioxide and water.What mass of water is formed if 3.2 g of methane reacts with 12.8 g of oxygen to produce 8.8 g of carbon dioxide?

Use the periodic table below to answer the following questions. -Which elements commonly form anions?

In addition to a beta particle,what is the other product of beta decay of ?

Which subatomic particle has the smallest mass?

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?

The observation that hydrogen and oxygen can react to form two compounds with different chemical and physical properties,one having an O:H mass ratio = 8:1 and the other having an O:H mass ratio = 16:1 is consistent with the law of

KH2PO4 is

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound CaCl2?

If shaded and unshaded spheres represent atoms of different elements,as shown in drawing (1),which drawings (2)-(4)represent the law of multiple proportions?

What is the chemical formula for magnesium hydride?

-If shaded and unshaded spheres represent atoms of different elements,which of the above drawings most likely represents an ionic compound at room temperature and a pressure of 1 atm?

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 45.0 g of calcium fluoride?

What is the identity of element Q if the ion Q2+ contains 10 electrons?

Which of the following statements about gamma radiation is false?

Which of the following is a part of Dalton's atomic theory?

Chemistry: Matter and Measurement

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

KH₂PO₄ is

In the following drawings,shaded spheres represent cations and unshaded spheres represent anions. -Which drawing represents the ionic compound CaCl₂?

What is the identity of element Q if the ion Q²⁺ contains 10 electrons?