Question 1

. If the compositions of the two compounds are consistent with the law of multiple proportions, which of the following compositions could be that of compound 2?

Accepted Answer

A)   23.4 mass % A; 76.6 mass % B
B)   30.4 mass % A; 69.6 mass % B
C)   33.3 mass % A; 66.7 mass % B
D)   53.3 mass % A; 46.7 mass % B
E)   73.3 mass % A; 26.7 mass % BF) All of the above
G) A) and D)

Question 2

A column of the periodic table is called a

Accepted Answer

A)   group.
B)   period.
C)   isotopic mixture.
D)   pillar.
E)   shell.F) C) and D)
G) C) and E)

Question 3

Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.

Accepted Answer

A)   653.52 amu
B)   259.89 amu
C)   221.90 amu
D)   202.90 amu
E)   145.90 amuF) B) and C)
G) A) and C)

Question 4

The chemical symbol for potassium is:

Accepted Answer

A)   P
B)   Po
C)   Pt
D)   Pm
E)   KF) B) and E)
G) None of the above

Question 5

Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?

Accepted Answer

A)   BaF2, ionic compound
B)   BaF2, covalent compound
C)   BaF, ionic compound
D)   BaF, covalent compound
E)   Ba2F, ionic compoundF) C) and E)
G) B) and E)

Question 6

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) A) and C)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

laws of conservation...

Question 9

What is the formula for lithium nitrite?

Accepted Answer

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

Question 10

Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

Accepted Answer

A)   FeO
B)   Fe2O
C)   FeO3
D)   Fe2O5
E)   Fe2O3F) A) and B)
G) All of the above

Question 11

In nature, some elements exist as molecules, while others do not.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following compounds is ionic?

Accepted Answer

A)   PF3
B)   CS2
C)   HCl
D)   SO2
E)   MgCl2F) A) and E)
G) D) and E)

Question 13

What is the name of BBr3?

Accepted Answer

A)   boron bromide
B)   boric bromide
C)   boron tribromide
D)   tribromoboride
E)   bromine triborideF) D) and E)
G) B) and D)

Question 14

Millikan's oil-drop experiment

Accepted Answer

A)   established the charge on an electron.
B)   showed that all oil drops carried the same charge.
C)   provided support for the nuclear model of the atom.
D)   suggested that some oil drops carried fractional numbers of electrons.
E)   suggested the presence of a neutral particle in the atom.F) None of the above
G) D) and E)

Question 15

What is the name of the acid formed when HCN gas is dissolved in water?

Accepted Answer

A)   cyanic acid
B)   hydrocyanic acid
C)   cyanous acid
D)   hydrocyanous acid
E)   hydrogen cyanideF) A) and C)
G) All of the above

Question 16

The substance, CaSe, is used in materials which are electron emitters. What is its name?

Accepted Answer

A)   calcium monoselenide
B)   calcium(II)  selenide
C)   calcium selenide
D)   calcium(I)  selenide
E)   calcium(II)  seleniumF) B) and D)
G) All of the above

Question 17

Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers. What is its formula?

Accepted Answer

A)   NaO
B)   NaO2
C)   Na2O2
D)   Na2O
E)   NaH2O2F) D) and E)
G) C) and E)

Question 18

What is the name of IF7?

Accepted Answer

A)   iodine fluoride
B)   iodic fluoride
C)   iodine heptafluoride
D)   heptafluoroiodide
E)   heptafluorine iodideF) B) and E)
G) C) and E)

Question 19

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 20

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 C)
G) A) and B)

Exam 2: The Components of Matter

Iodine pentafluoride reacts slowly with glass and violently with water. Determine its molecular mass.

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Barium fluoride is used in embalming and in glass manufacturing. Which of the following gives the formula and bonding for barium fluoride?

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What is the name of IF7?

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In nature, some elements exist as molecules, while others do not.

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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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The substance, CaSe, is used in materials which are electron emitters. What is its name?

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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

Millikan's oil-drop experiment

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

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Which of the following compounds is ionic?

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What is the name of BBr3?

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Ferric oxide is used as a pigment in metal polishing. Which of the following is its formula?

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What is the formula for lithium nitrite?

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. If the compositions of the two compounds are consistent with the law of multiple proportions, which of the following compositions could be that of compound 2?

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

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What is the name of the acid formed when HCN gas is dissolved in water?

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

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A column of the periodic table is called a

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The chemical symbol for potassium is:

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Sodium peroxide is an oxidizer used to bleach animal and vegetable fibers. What is its formula?

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What is the name of IF₇?

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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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laws of conservation...
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What is the name of BBr₃?

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