Question 1

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 D)
G) A) and E)

Question 2

What is the formula for lithium nitrite?

Accepted Answer

A)   LiNO2
B)   Li2NO2
C)   LiNO3
D)   Li2NO3
E)   LiNO4F) All of the above
G) D) and E)

Question 3

Who is credited with discovering the atomic nucleus?

Accepted Answer

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

Question 4

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) C) and D)

Question 5

Lead (Pb) is a main-group element.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Question 8

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

Question 9

Which of the following compounds is ionic?

Accepted Answer

A)   PF3
B)   CS2
C)   HCl
D)   SO2
E)   MgCl2F) D) and E)
G) All of the above

Question 10

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) C) and E)

Question 11

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

Question 12

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) None of the above
G) B) and E)

Question 13

What is the name of P4Se3?

Accepted Answer

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

Question 14

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 E)
G) D) and E)

Question 15

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 B)
G) C) and E)

Question 16

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 D)
G) B) and E)

Question 17

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) B) and E)

Question 18

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) B) and E)
G) C) and D)

Question 19

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

Question 20

The formula of heptane is

Accepted Answer

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

Exam 2: The Components of Matter

The formula of heptane is

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Which of the following compounds is ionic?

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

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

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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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What is the name of P4Se3?

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

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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?

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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 formula for lithium nitrite?

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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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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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Who is credited with discovering the atomic nucleus?

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

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Lead (Pb) is a main-group element.

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

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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 is a polyatomic cation?

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What is the name of P₄Se₃?

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

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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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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, 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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