Question 1

The formula of heptane is

Accepted Answer

A)   C6H12.
B)   C6H14.
C)   C7H14.
D)   C7H16.
E)   C8H16.F) A) and C)
G) C) and D)

Question 2

Which of the following compounds is ionic?

Accepted Answer

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

Question 3

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

Question 4

What are the approximate carbon:hydrogen mass ratios in methane (CH4)  and ethyne (C2H2) ?

Accepted Answer

A)   1:4 and 1:1
B)   3:2 and 6:1
C)   3:1 and 12:1
D)   3:2 and 12:1
E)   3:1 and 6:1F) C) and D)
G) D) and E)

Question 5

Kaolinite, a clay mineral with the formula Al4Si4O10(OH) 8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

Accepted Answer

A)   1.792 mass %
B)   24.80 mass %
C)   30.81 mass %
D)   34.12 mass %
E)   55.81 mass %F) B) and C)
G) None of the above

Question 6

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

Question 7

What is the name of P4Se3?

Accepted Answer

A)   phosphorus selenide
B)   phosphorus triselenide
C)   tetraphosphorus selenide
D)   phosphoric selenide
E)   tetraphosphorus triselenideF) A) and E)
G) A) and B)

Question 8

Lead (Pb) is a main-group element.

Accepted Answer

A) True 
 B)False

Question 9

Who is credited with discovering the atomic nucleus?

Accepted Answer

A)   Dalton
B)   Gay-Lussac
C)   Thomson
D)   Millikan
E)   RutherfordF) All of the above
G) D) and E)

Question 10

Which one of the following is a polyatomic cation?

Accepted Answer

A)   nitrate
B)   chromate
C)   permanganate
D)   hydronium
E)   potassiumF) A) and B)
G) A) and C)

Question 11

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

Question 12

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) D) and E)
G) All of the above

Question 13

In the ionic compound with the general formula M2 X3, the likely charge on X is

Accepted Answer

A)   +1.
B)   +3.
C)   -1.
D)   -2.
E)   -3.F) C) and D)
G) B) and D)

Question 14

The compound, P4S10, is used in the manufacture of safety matches. What is its name?

Accepted Answer

A)   phosphorus sulfide
B)   phosphoric sulfide
C)   phosphorus decasulfide
D)   tetraphosphorus decasulfide
E)   phosphorus pentasulfideF) A) and D)
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) C) and D)
G) A) and D)

Question 16

When an alkali metal combines with a non-metal, a covalent bond is normally formed.

Accepted Answer

A) True 
 B)False

Question 17

Rutherford bombarded gold foil with alpha (α)  particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Accepted Answer

A)   the small size of the nucleus
B)   the charge on the nucleus
C)   the total mass of the atom
D)   the existence of protons
E)   the presence of electrons outside the nucleusF) D) and E)
G) A) and B)

Question 18

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 B)
G) A) and C)

Question 19

What is the formula for lithium nitrite?

Accepted Answer

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

Question 20

Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

Accepted Answer

A)   261.97 amu
B)   238.98 amu
C)   161.97 amu
D)   138.98 amu
E)   74.99 amuF) A) and B)
G) C) and E)

Exam 2: The Components of Matter

Kaolinite, a clay mineral with the formula Al4Si4O10(OH) 8, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

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

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

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The compound, P4S10, is used in the manufacture of safety matches. What is its name?

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

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Lead (Pb) is a main-group element.

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In the ionic compound with the general formula M2 X3, the likely charge on X is

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

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Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.

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The formula of heptane is

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What are the approximate carbon:hydrogen mass ratios in methane (CH4) and ethyne (C2H2) ?

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Who is credited with discovering the atomic nucleus?

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Which of the following compounds is ionic?

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What is the name of P4Se3?

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

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Rutherford bombarded gold foil with alpha (α) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

Correct AnswerverifiedShow Answer

When an alkali metal combines with a non-metal, a covalent bond is normally formed.

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What is the formula for lithium nitrite?

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Which one of the following is a polyatomic cation?

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Kaolinite, a clay mineral with the formula Al₄Si₄O₁₀(OH) ₈, is used as a filler in slick-paper for magazines and as a raw material for ceramics. Analysis shows that 14.35 g of kaolinite contains 8.009 g of oxygen. Calculate the mass percent of oxygen in kaolinite.

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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 compound, P₄S₁₀, is used in the manufacture of safety matches. What is its name?

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In the ionic compound with the general formula M₂ X₃, the likely charge on X is

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What are the approximate carbon:hydrogen mass ratios in methane (CH₄) and ethyne (C₂H₂) ?

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What is the name of P₄Se₃?

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