Question 1

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

Accepted Answer

A)   NaO, ionic compound
B)   NaO, covalent compound
C)   Na2O, ionic compound
D)   Na2O, covalent compound
E)   Na2O2, ionic compoundF) A) and E)
G) All of the above

Question 2

Which, if any, of the following elements do not occur in the major classes of organic compounds?

Accepted Answer

A)   H
B)   C
C)   N
D)   O
E)   All the above elements occur in the major classes of organic compounds.F) B) and D)
G) B) and C)

Question 3

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

Accepted Answer

A)   O2- oxide
B)   Al3+ aluminum
C)   NO3- nitrate
D)   PO43- phosphate
E)   CrO42- chromateF) B) and E)
G) A) and C)

Question 4

The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Accepted Answer

A)   cobalt dichloride
B)   cobalt(II)  chloride
C)   cobalt chloride
D)   cobaltic chloride
E)   copper(II)  chlorideF) All of the above
G) A) and B)

Question 5

Which of the following ions occurs commonly?

Accepted Answer

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

Question 6

One amu is defined as

Accepted Answer

A)   the mass of a proton.
B)   1/12 the mass of an atom of  .
C)   the mass of an atom of  .
D)   1/20 the mass of an atom of  .
E)   1/16 the mass of an atom of  .F) None of the above
G) A) and C)

Question 7

Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

Accepted Answer

A)   77.9 amu
B)   80.0 amu
C)   80.1 amu
D)   80.9 amu
E)   88.9 amuF) A) and B)
G) A) and C)

Question 8

The compound, (NH4) 2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

Accepted Answer

A)   ammonium sulfide
B)   diammonium sulfide
C)   ammonium sulfite
D)   ammonia(I)  sulfite
E)   ammonium(I)  sulfideF) B) and D)
G) None of the above

Question 9

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

Question 10

What is the formula for magnesium sulfide?

Accepted Answer

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

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) D) and E)

Question 12

Select the incorrect statement about elements and compounds.

Accepted Answer

A)   All ionic compounds are neutral.
B)   Some elements exist as molecules.
C)   The bonding in compounds may be covalent or ionic.
D)   The molecular formula of a compound provides more information than the structural formula.
E)   Among the elements, there are more metals than non-metals.F) A) and E)
G) All of the above

Question 13

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

Question 14

The molecular formula of a compound provides more information than its structural formula.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following elements are the least reactive?

Accepted Answer

A)   alkali metals
B)   noble gases
C)   halogens
D)   alkaline earth metals
E)   metalloidsF) C) and E)
G) D) and E)

Question 16

Who is credited with discovering the atomic nucleus?

Accepted Answer

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

Question 17

Name the three important "laws" that were accounted for by Dalton's atomic theory.

Accepted Answer

laws of conservation...

Question 18

Copper (Cu) is a transition metal.

Accepted Answer

A) True 
 B)False

Question 19

a. Give the names of the following ions:
(i) NH4+
(ii) SO32-
b. Write down the formulas of the following ions:
(i) aluminum
(ii) carbonate

Accepted Answer

a. (i) amm...

Question 20

What is the formula for lithium nitrite?

Accepted Answer

A)   LiNO2
B)   Li2NO2
C)   LiNO3
D)   Li2NO3
E)   LiNO4F) C) and D)
G) A) and B)

Exam 2: The Components of Matter

Sodium oxide combines violently with water. Which of the following gives the formula and the bonding for sodium oxide?

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Copper (Cu) is a transition metal.

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Name the three important "laws" that were accounted for by Dalton's atomic theory.

Correct Answerverifiedlaws of conservation...View AnswerShow Answer

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

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

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The molecular formula of a compound provides more information than its structural formula.

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One amu is defined as

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Which, if any, of the following elements do not occur in the major classes of organic compounds?

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Bromine has two naturally-occurring isotopes. 79Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

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Which of the following ions occurs commonly?

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Which of the following elements are the least reactive?

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

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The substance, CoCl2, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

Correct AnswerverifiedShow Answer

Who is credited with discovering the atomic nucleus?

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What is the formula for magnesium sulfide?

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The compound, (NH4) 2S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

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a. Give the names of the following ions: (i) NH4+ (ii) SO32- b. Write down the formulas of the following ions: (i) aluminum (ii) carbonate

Correct Answerverifieda. (i) amm...View AnswerShow Answer

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

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Select the incorrect statement about elements and compounds.

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What is the formula for lithium nitrite?

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laws of conservation...
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Bromine has two naturally-occurring isotopes. ⁷⁹Br has a mass of 78.9 amu and accounts for 50.3% of bromine atoms. If the atomic mass of bromine is 79.9 amu, what is the mass of an atom of the second bromine isotope?

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The substance, CoCl₂, is useful as a humidity indicator because it changes from pale blue to pink as it gains water from moist air. What is its name?

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The compound, (NH₄) ₂S, can be used in analysis for trace amounts of metals present in a sample. What is its name?

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a. Give the names of the following ions: (i) NH₄⁺ (ii) SO₃^2- b. Write down the formulas of the following ions: (i) aluminum (ii) carbonate

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a. (i) amm...
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