Question 1

An empirical formula tell us which ions are present in a compound and gives the whole-number ratio of the atoms of these elements in the compound.

Accepted Answer

A) True 
 B)False  False

Question 2

The formula of calcium carbonate is CaCO3.

Accepted Answer

A) True 
 B)False

Question 3

Give the formula for potassium oxide.

Accepted Answer

A)   KO
B)   KO2
C)   K2O
D)   K2O4
E)   KO3F) C) and D)
G) A) and D)

Question 4

How many protons and electrons are present in one Br- ion

Accepted Answer

A)   35 p, 35 e
B)   80 p, 81 e
C)   35 p, 34 e
D)   35 p, 36 e
E)   80 p, 34 eF) All of the above
G) B) and E)

Question 5

What are the two different ions present in the compound Na2S

Accepted Answer

A)   Na2+, S2-
B)   Na+, S2-
C)   Na2+, S2-
D)   Na+, S-
E)   Na2+, S-F) All of the above
G) A) and E)

Question 6

Give the formula for carbon disulfide.

Accepted Answer

A)   CsS2
B)   C3S4
C)   C2S
D)   CS
E)   CS2F) A) and C)
G) None of the above

Question 7

How many electrons, protons, and neutrons does an iron-55 atom have

Accepted Answer

A)   26 electrons, 26 protons, and 29 neutrons
B)   55 electrons, 26 protons, and 29 neutrons
C)   26 electrons, 55 protons, and 29 neutrons
D)   26 electrons, 26 protons, and 55 neutrons
E)   29 electrons, 26 protons, and 26 neutronsF) B) and D)
G) C) and D)

Question 8

The name for CuSO4·5H2O is

Accepted Answer

A)   copper sulfate acid.
B)   copper sulfate pentahydrate.
C)   copper(II)  sulfate acid.
D)   copper(II)  sulfate pentahydrate.
E)   copper(V)  sulfate hydrate.F) B) and D)
G) C) and D)

Question 9

Give the formula for cobalt(II)  chlorate dihydrate.

Accepted Answer

A)   CoCl2·2H2O
B)   CoClO3(H2O) 2
C)   Co(ClO3) 2(H2O) 2
D)   Co(ClO3) 2·2H2O
E)   Co2(ClO3) 3·2H2OF) B) and C)
G) B) and D)

Question 10

Name the compound NO2.

Accepted Answer

A)   mononitrogen dioxygen
B)   nitrogen dioxide
C)   dinitrogen monoxide
D)   nitrogen oxide
E)   nitriteF) B) and D)
G) A) and C)

Question 11

What type of compound is NaOH

Accepted Answer

A)   Binary
B)   Molecular
C)   Acid
D)   Base
E)   HydrateF) None of the above
G) B) and E) D

Question 12

What type of compound is H2SO3

Accepted Answer

A)   Ionic
B)   Binary
C)   Acid
D)   Base
E)   HydrateF) A) and B)
G) A) and C)

Question 13

How many hydrogen atoms are in one molecule of CH3(CH2) 3CH3

Accepted Answer

A)   10
B)   12
C)   14
D)   16
E)   None of the aboveF) C) and D)
G) All of the above

Question 14

Give the formula of copper(II)  bromide.

Accepted Answer

A)   Cu2Br
B)   CuBr2
C)   Cu3Br4
D)   Cu2B
E)   Cu2Br4F) A) and D)
G) A) and E)

Question 15

The correct formula for xenon difluoride is XF2.

Accepted Answer

A) True 
 B)False

Question 16

Name the compound Co(NO3) 2.

Accepted Answer

A)   Cobalt (I)  nitrate
B)   Cobalt (II)  nitrate
C)   Cobalt (I)  nitride
D)   Cobalt nitrite
E)   Cobalt (II)  nitrideF) A) and B)
G) A) and C)

Question 17

The proton is about 1840 times heavier than the electron.

Accepted Answer

A) True 
 B)False

Question 18

Isotopes are atoms of the same element that have the same atomic number but different mass numbers.

Accepted Answer

A) True 
 B)False

Question 19

What is the correct formula for xenon hexafluoride

Accepted Answer

A)   X6F
B)   Xe6F
C)   XeF6
D)   Xe6F6
E)   XF6F) B) and C)
G) B) and D)

Question 20

What type of compound is Mg(NO3) 2

Accepted Answer

A)   Ionic
B)   Molecular
C)   Acid
D)   Base
E)   HydrateF) A) and C)
G) B) and D) A

Exam 2: Atoms Molecules and Ions

An empirical formula tell us which ions are present in a compound and gives the whole-number ratio of the atoms of these elements in the compound.

Correct AnswerverifiedFalse

The formula of calcium carbonate is CaCO3.

Correct AnswerverifiedShow Answer

Give the formula for potassium oxide.

Correct AnswerverifiedShow Answer

How many protons and electrons are present in one Br- ion

Correct AnswerverifiedShow Answer

What are the two different ions present in the compound Na2S

Correct AnswerverifiedShow Answer

Give the formula for carbon disulfide.

Correct AnswerverifiedShow Answer

How many electrons, protons, and neutrons does an iron-55 atom have

Correct AnswerverifiedShow Answer

The name for CuSO4·5H2O is

Correct AnswerverifiedShow Answer

Give the formula for cobalt(II) chlorate dihydrate.

Correct AnswerverifiedShow Answer

Name the compound NO2.

Correct AnswerverifiedShow Answer

What type of compound is NaOH

Correct AnswerverifiedD

What type of compound is H2SO3

Correct AnswerverifiedShow Answer

How many hydrogen atoms are in one molecule of CH3(CH2) 3CH3

Correct AnswerverifiedShow Answer

Give the formula of copper(II) bromide.

Correct AnswerverifiedShow Answer

The correct formula for xenon difluoride is XF2.

Correct AnswerverifiedShow Answer

Name the compound Co(NO3) 2.

Correct AnswerverifiedShow Answer

The proton is about 1840 times heavier than the electron.

Correct AnswerverifiedShow Answer

Isotopes are atoms of the same element that have the same atomic number but different mass numbers.

Correct AnswerverifiedShow Answer

What is the correct formula for xenon hexafluoride

Correct AnswerverifiedShow Answer

What type of compound is Mg(NO3) 2

Correct AnswerverifiedA

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False

The formula of calcium carbonate is CaCO₃.

Correct Answer
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How many protons and electrons are present in one Br^- ion

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What are the two different ions present in the compound Na₂S

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The name for CuSO₄·5H₂O is

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Name the compound NO₂.

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D

What type of compound is H₂SO₃

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How many hydrogen atoms are in one molecule of CH₃(CH₂) ₃CH₃

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The correct formula for xenon difluoride is XF₂.

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Name the compound Co(NO₃) ₂.

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What type of compound is Mg(NO₃) ₂

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A