Question 1

Which one of the following combinations of names and formulas of ions is incorrect?

Accepted Answer

A)   NH4+ ammonium
B)   S2- sulfide
C)   CN- cyanide
D)   S2O32- thiosulfate
E)   ClO3- perchlorateF) A) and D)
G) All of the above

Question 2

The formula C9H20 is an empirical formula.

Accepted Answer

A) True 
 B)False

Question 3

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Accepted Answer

A)   (ClO) 2
B)   Cl2O
C)   Cl2O2
D)   Cl2O4
E)   ClO2F) C) and E)
G) A) and B)

Question 4

Copper (Cu) is a transition metal.

Accepted Answer

A) True 
 B)False

Question 5

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Accepted Answer

A)   magnesium difluoride
B)   magnesium fluoride
C)   magnesium(II)  fluoride
D)   monomagnesium difluoride
E)   None of these choices is correct since they are all misspelled.F) A) and D)
G) B) and C)

Question 6

Modern studies have shown that the Law of Multiple Proportions is not valid.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is a metalloid?

Accepted Answer

A)   carbon, C, Z = 6
B)   sulfur, S, Z = 16
C)   germanium, Ge, Z = 32
D)   iridium, Z = 77
E)   bromine, Br, Z = 35F) D) and E)
G) A) and B)

Question 8

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain. What is its formula?

Accepted Answer

A)   ZnAc2
B)   ZnCH3COO
C)   Zn(CH3COO) 2
D)   Zn2CH3COO
E)   ZnCH3COCH3F) A) and E)
G) D) and E)

Question 9

Which one of the following formulas of ionic compounds is the least likely to be correct?

Accepted Answer

A)   NH4Cl
B)   Ba(OH) 2
C)   Na2SO4
D)   Ca2NO3
E)   Cu(CN) 2F) A) and D)
G) A) and E)

Question 10

What is the formula for magnesium sulfide?

Accepted Answer

A)   MgS
B)   MgS2
C)   Mg2S
D)   Mg2S3
E)   MgSO4F) A) and D)
G) A) and C)

Question 11

Which one of the following formulas of ionic compounds is the least likely to be correct?

Accepted Answer

A)   CaCl2
B)   NaSO4
C)   MgCO3
D)   KF
E)   Cu(NO3) 2F) A) and B)
G) C) and D)

Question 12

For each of the following names, write down the corresponding formula, including charge where appropriate (atomic numbers and mass numbers are not required):
A) zinc ion
B) nitrite ion
C) carbonic acid
D) cyanide ion

Accepted Answer

a. Zn²⁺
b. ...

Question 13

Iron (III)  chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

Accepted Answer

A)   Fe(Cl*6H2O) 3
B)   Fe3Cl*6H2O
C)   FeCl3(H2O) 6
D)   Fe3Cl(H2O) 6
E)   FeCl3*6H2OF) C) and D)
G) A) and C)

Question 14

Silicon, which makes up about 25% of Earth's crust by mass, is used widely in the modern electronics industry. It has three naturally occurring isotopes, 28Si, 29Si, and 30Si. Calculate the atomic mass of silicon. 28Si, 29Si, and 30Si. Calculate the atomic mass of silicon.   A)  29.2252 amu B)  28.9757 amu C)  28.7260 amu D)  28.0855 amu E)  27.9801 amu" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   29.2252 amu
B)   28.9757 amu
C)   28.7260 amu
D)   28.0855 amu
E)   27.9801 amuF) C) and D)
G) A) and C)

Question 15

Which of the following symbols does not represent an element?

Accepted Answer

A)   O2
B)   Co
C)   HF
D)   Cs
E)   XeF) All of the above
G) B) and E)

Question 16

Which one of the following combinations of names and formulas of ions is incorrect?

Accepted Answer

A)   Ba2+ barium
B)   S2- sulfate
C)   CN- cyanide
D)   ClO4- perchlorate
E)   HCO3- bicarbonateF) A) and B)
G) A) and E)

Question 17

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: -5.92; -4.44; -2.96; -8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Accepted Answer

A)   -1.11
B)   -1.48
C)   -2.22
D)   -2.96
E)   -5.55F) A) and D)
G) A) and B)

Question 18

The formula of heptane is:

Accepted Answer

A)   C6H12
B)   C6H14
C)   C7H14
D)   C7H16
E)   C8H16F) B) and E)
G) A) and E)

Question 19

In the ionic compound with the general formula M2X3, the likely charge on X is:

Accepted Answer

A)   +1
B)   +3
C)   -1
D)   -2
E)   -3F) A) and B)
G) None of the above

Question 20

What is the formula for lead (II)  oxide?

Accepted Answer

A)   PbO
B)   PbO2
C)   Pb2O
D)   PbO4
E)   Pb2O3F) D) and E)
G) B) and D)

Exam 2: The Components of Matter

Zinc acetate is used in preserving wood and in manufacturing glazes for porcelain. What is its formula?

Correct AnswerverifiedShow Answer

The colorless substance, MgF2, is used in the ceramics and glass industry. What is its name?

Correct AnswerverifiedShow Answer

Which one of the following combinations of names and formulas of ions is incorrect?

Correct AnswerverifiedShow Answer

The formula of heptane is:

Correct AnswerverifiedShow Answer

Which one of the following combinations of names and formulas of ions is incorrect?

Correct AnswerverifiedShow Answer

Silicon, which makes up about 25% of Earth's crust by mass, is used widely in the modern electronics industry. It has three naturally occurring isotopes, 28Si, 29Si, and 30Si. Calculate the atomic mass of silicon.

Correct AnswerverifiedShow Answer

What is the formula for magnesium sulfide?

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Which of the following symbols does not represent an element?

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In the ionic compound with the general formula M2X3, the likely charge on X is:

Correct AnswerverifiedShow Answer

The formula C9H20 is an empirical formula.

Correct AnswerverifiedShow Answer

Iron (III) chloride hexahydrate is used as a coagulant for sewage and industrial wastes. What is its formula?

Correct AnswerverifiedShow Answer

Chlorine dioxide is a strong oxidizer that is used for bleaching flour and textiles and for purification of water. What is its formula?

Correct AnswerverifiedShow Answer

Which of the following is a metalloid?

Correct AnswerverifiedShow Answer

In a Millikan oil-drop experiment, the charges on several different oil drops were as follows: -5.92; -4.44; -2.96; -8.88. The units are arbitrary. What is the likely value of the electronic charge in these arbitrary units?

Correct AnswerverifiedShow Answer

Which one of the following formulas of ionic compounds is the least likely to be correct?

Correct AnswerverifiedShow Answer

Copper (Cu) is a transition metal.

Correct AnswerverifiedShow Answer

What is the formula for lead (II) oxide?

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For each of the following names, write down the corresponding formula, including charge where appropriate (atomic numbers and mass numbers are not required): A) zinc ion B) nitrite ion C) carbonic acid D) cyanide ion

Correct Answerverifieda. Zn2+ b. ...View AnswerShow Answer

Modern studies have shown that the Law of Multiple Proportions is not valid.

Correct AnswerverifiedShow Answer

Which one of the following formulas of ionic compounds is the least likely to be correct?

Correct AnswerverifiedShow Answer

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The colorless substance, MgF₂, is used in the ceramics and glass industry. What is its name?

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Silicon, which makes up about 25% of Earth's crust by mass, is used widely in the modern electronics industry. It has three naturally occurring isotopes, ²⁸Si, ²⁹Si, and ³⁰Si. Calculate the atomic mass of silicon.

Correct Answer
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In the ionic compound with the general formula M₂X₃, the likely charge on X is:

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The formula C₉H₂₀ is an empirical formula.

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a. Zn²⁺
b. ...
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