Question 1

What is the charge on the Fe ions in Fe2O3?

Accepted Answer

A)   2-
B)   1+
C)   2+
D)   3+E) C) and D)
F) None of the above

Question 2

The ion,AsO33-,is named

Accepted Answer

A)   arsenate ion.
B)   arsenite ion.
C)   arsenic dioxide ion.
D)   arsenic(II)  oxide ion.E) None of the above
F) A) and C)

Question 3

A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO2 and 70.44 grams of H2O.What is the empirical formula of the alcohol?

Accepted Answer

Question 4

Which of the following is a molecular compound?

Accepted Answer

A)   Cu F2
B)   P2O4
C)   NaNO3
D)   SrSO3
E)   Rb FF) A) and D)
G) B) and E)

Question 5

Describe the difference between a molecular formula and an empirical formula.Give an example.

Accepted Answer

A molecular formula is the exact number ...

Question 6

Identify an ionic bond.

Accepted Answer

A)   Neutrons are pooled.
B)   Electrons are shared.
C)   Electrons are transferred.
D)   Protons are gained.
E)   Protons are lost.F) A) and B)
G) A) and C)

Question 7

Determine the name for TiCO3.Remember that titanium forms several ions.

Accepted Answer

A)   titanium (II)  carbonate
B)   titanium carbide
C)   titanium carbonite
D)   titanium (II)  carbonite
E)   titanium (I)  carbonateF) A) and C)
G) C) and D)

Question 8

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 30.0 g of calcium fluoride?

Accepted Answer

A)   1.71 g
B)   7.70 g
C)   15.0 g
D)   15.4 gE) A) and B)
F) B) and C)

Question 9

Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Accepted Answer

The Mg²⁺ and Na⁺ ion are similar in size ...

Question 10

Identify an amine.

Accepted Answer

A)   CH3CH2SCH2CH3
B)   CH3CH2Cl
C)   CH3CH2NH2
D)   CH3CH2CH2CH3
E)   CH3COOHF) All of the above
G) B) and D)

Question 11

Which of the following ionic compounds would be expected to have the highest lattice energy?

Accepted Answer

A)   Li Br
B)   Na Br
C)   K Br
D)   Rb BrE) B) and C)
F) A) and D)

Question 12

In which set do all elements tend to form cations in binary ionic compounds?

Accepted Answer

A)   Na, Al, S
B)   Ca, Mn, Sn
C)   P, As, Sb
D)   S, Cl, BrE) C) and D)
F) B) and D)

Question 13

How many moles of C6H8 contain 4.95 × 1024 hydrogen atoms?

Accepted Answer

A)   8.22 moles C6H8
B)   6.58 moles C6H8
C)   1.03 moles C6H8
D)   9.73 moles C6H8
E)   3.09 moles C6H8F) C) and E)
G) C) and D)

Question 14

The compound,Cu( N O3) 2,is named

Accepted Answer

A)   copper nitrate(II) .
B)   copper(I)  nitrate.
C)   copper(I)  nitrate(II) .
D)   copper(II)  nitrate.E) All of the above
F) A) and B)

Question 15

Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

Accepted Answer

A)   RbBr > NaF > KCl
B)   NaF > KCl > RbBr
C)   KCl > NaF > RbBr
D)   NaF > RbBr > KCl
E)   RbBr > KCl > NaFF) None of the above
G) A) and B)

Question 16

Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

Accepted Answer

A)   NO
B)   N2O
C)   NO2
D)   N2O3
E)   NO3F) B) and D)
G) A) and E)

Question 17

Calculate the mass percent composition of oxygen in Al2(SO4)3.

Accepted Answer

Question 18

Calculate the molar mass of H2CO3.

Accepted Answer

A)   62.03 g/mol
B)   29.02 g/mol
C)   61.02 g/mol
D)   60.01 g/mol
E)   74.04 g/molF) B) and D)
G) A) and E)

Question 19

A double covalent bond contains ________ of electrons.

Accepted Answer

A)   0 pairs
B)   1 pair
C)   2 pairs
D)   3 pairs
E)   4 pairsF) A) and E)
G) B) and C)

Question 20

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Accepted Answer

A)   Li2O > K2O > Rb2S
B)   Li2O > Rb2S > K2O
C)   Rb2S > K2O > Li2O
D)   Rb2S > Li2O > K2O
E)   K2O > Li2O > Rb2SF) C) and E)
G) None of the above

Exam 5: Molecules and Compounds

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

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What is the charge on the Fe ions in Fe2O3?

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The compound,Cu( N O3) 2,is named

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A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO2 and 70.44 grams of H2O.What is the empirical formula of the alcohol?

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The ion,AsO33-,is named

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Which of the following ionic compounds would be expected to have the highest lattice energy?

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A double covalent bond contains ________ of electrons.

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Calculate the mass percent composition of oxygen in Al2(SO4)3.

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Determine the name for TiCO3.Remember that titanium forms several ions.

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How many moles of C6H8 contain 4.95 × 1024 hydrogen atoms?

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In which set do all elements tend to form cations in binary ionic compounds?

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Place the following in order of decreasing magnitude of lattice energy. NaF RbBr KCl

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Which of the following is a molecular compound?

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Calculate the molar mass of H2CO3.

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Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.

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A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium.How much calcium is contained in 30.0 g of calcium fluoride?

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Identify an ionic bond.

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Identify an amine.

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Explain why the lattice energy of MgS is approximately 4 times as large as that of NaCl.

Correct AnswerverifiedThe Mg2⁺ and Na⁺ ion are similar in size ...View AnswerShow Answer

Describe the difference between a molecular formula and an empirical formula.Give an example.

Correct AnswerverifiedA molecular formula is the exact number ...View AnswerShow Answer

Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

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What is the charge on the Fe ions in Fe₂O₃?

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The compound,Cu( N O₃) ₂,is named

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A certain alcohol contains only three elements,carbon,hydrogen,and oxygen.Combustion of a 60.00 gram sample of the alcohol produced 114.6 grams of CO₂ and 70.44 grams of H₂O.What is the empirical formula of the alcohol?

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The ion,AsO₃^3-,is named

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Calculate the mass percent composition of oxygen in Al₂(SO₄)₃.

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Determine the name for TiCO₃.Remember that titanium forms several ions.

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How many moles of C₆H₈ contain 4.95 × 10²⁴ hydrogen atoms?

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Calculate the molar mass of H₂CO₃.

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The Mg²⁺ and Na⁺ ion are similar in size ...
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A molecular formula is the exact number ...
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