Question 1

Ammonium sulfate, (NH4) 2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Accepted Answer

A)   63.07 amu
B)   114.10 amu
C)   118.13 amu
D)   128.11 amu
E)   132.13 amuF) B) and E)
G) A) and D)

Question 2

All neutral atoms of tin have 50 protons and 50 electrons.

Accepted Answer

A) True 
 B)False

Question 3

What is the name of the acid formed when HClO4 liquid is dissolved in water?

Accepted Answer

A)   hydrochloric acid
B)   perchloric acid
C)   chloric acid
D)   chlorous acid
E)   hydrochlorate acidF) A) and B)
G) B) and C)

Question 4

Which of the following ions occurs commonly?

Accepted Answer

A)   P3+
B)   Br7+
C)   O6+
D)   Ca2+
E)   K-F) C) and D)
G) B) and C)

Question 5

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 B)
G) A) and C)

Question 6

Atoms of one element cannot be converted to another element by any known method.

Accepted Answer

A) True 
 B)False

Question 7

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide. What is its chemical formula?

Accepted Answer

A)   I2O5
B)   IO5
C)   2IO5
D)   I5O2
E)   (IO5) 2F) A) and E)
G) B) and E)

Question 8

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) B) and D)
G) A) and E)

Question 9

The compound, NaH2PO4, is present in many baking powders. What is its name?

Accepted Answer

A)   sodium biphosphate
B)   sodium hydrogen phosphate
C)   sodium dihydrogen phosphate
D)   sodium hydrophosphate
E)   sodium dihydride phosphateF) All of the above
G) A) and D)

Question 10

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

Accepted Answer

A) True 
 B)False

Question 11

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) A) and B)
G) A) and C)

Question 12

Who is credited with measuring the mass/charge ratio of the electron?

Accepted Answer

A)   Dalton
B)   Gay-Lussac
C)   Thomson
D)   Millikan
E)   RutherfordF) B) and E)
G) A) and E)

Question 13

The compound, BaO, absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. What is its name?

Accepted Answer

A)   barium oxide
B)   barium(II)  oxide
C)   barium monoxide
D)   baric oxide
E)   barium peroxideF) C) and D)
G) A) and B)

Question 14

The name for HF(g)  is

Accepted Answer

A)   hydrofluoric acid.
B)   hydrogen(I)  fluoride.
C)   hydrogen fluoride.
D)   hydrogen fluorine.
E)   fluoric acid.F) B) and C)
G) A) and E)

Question 15

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

Accepted Answer

A)   H3PO4 phosphoric acid
B)   HNO3 nitric acid
C)   NaHCO3 sodium carbonate
D)   H2CO3 carbonic acid
E)   KOH potassium hydroxideF) B) and E)
G) A) and E)

Question 16

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) All of the above
G) A) and B)

Question 17

Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?

Accepted Answer

A)   X & Y
B)   X & R
C)   Y & R
D)   Z & R
E)   X & ZF) B) and D)
G) B) and E)

Question 18

Copper (Cu) is a transition metal.

Accepted Answer

A) True 
 B)False

Question 19

Silver chloride is used in photographic emulsions. What is its formula?

Accepted Answer

A)   Ag2Cl3
B)   Ag2Cl
C)   AgCl3
D)   AgCl2
E)   AgClF) B) and E)
G) A) and D)

Question 20

What is the name of Na2O?

Accepted Answer

A)   disodium monoxide
B)   sodium monoxide
C)   sodium dioxide
D)   sodium(I)  oxide
E)   sodium oxideF) A) and C)
G) B) and D)

Exam 2: The Components of Matter

What is the name of Na2O?

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Which of the following ions occurs commonly?

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The compound, BaO, absorbs water and carbon dioxide readily and is used to dry gases and organic solvents. What is its name?

Correct AnswerverifiedShow Answer

The compound, NaH2PO4, is present in many baking powders. What is its name?

Correct AnswerverifiedShow Answer

Atoms of one element cannot be converted to another element by any known method.

Correct AnswerverifiedShow Answer

Who is credited with measuring the mass/charge ratio of the electron?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Ammonium sulfate, (NH4) 2SO4, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Correct AnswerverifiedShow Answer

Silver chloride is used in photographic emulsions. What is its formula?

Correct AnswerverifiedShow Answer

The name for HF(g) is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the name of the acid formed when HClO4 liquid is dissolved in water?

Correct AnswerverifiedShow Answer

Diiodine pentaoxide is used as an oxidizing agent that converts carbon monoxide to carbon dioxide. What is its chemical 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

Copper (Cu) is a transition metal.

Correct AnswerverifiedShow Answer

The mass of a neutron is equal to the mass of a proton plus the mass of an electron.

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

Atoms X, Y, Z, and R have the following nuclear compositions: Which two are isotopes?

Correct AnswerverifiedShow Answer

All neutral atoms of tin have 50 protons and 50 electrons.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

What is the name of Na₂O?

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The compound, NaH₂PO₄, is present in many baking powders. What is its name?

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Ammonium sulfate, (NH₄) ₂SO₄, is a fertilizer widely used as a source of nitrogen. Calculate its molecular mass.

Correct Answer
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What is the name of the acid formed when HClO₄ liquid is dissolved in water?

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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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