Question 1

What is the mass of a single bromine molecule,Br2?

Accepted Answer

A)   1.327 × 10-22 g
B)   2.654 × 10-22 g
C)   79.90 g
D)   159.8 gE) None of the above
F) C) and D)

Question 2

What is the chemical formula for strontium hydride?

Accepted Answer

A)   SrH2
B)   SrOH
C)   SrOH2
D)   Sr(OH) 2E) B) and C)
F) C) and D)

Question 3

Write the name for Ba3(PO4) 2.

Accepted Answer

A)   barium (III)  phosphite
B)   barium (II)  phosphite
C)   barium phosphate
D)   tri barium phosphorustetraoxide
E)   barium phosphiteF) All of the above
G) B) and E)

Question 4

Which of the following is an atomic element?

Accepted Answer

A)   bromine
B)   hydrogen
C)   nitrogen
D)   oxygen
E)   calciumF) C) and D)
G) B) and E)

Question 5

Place the following in order of increasing magnitude of lattice energy. MgO KI Ba O

Accepted Answer

A)   Ba O 
B)   KI 
C)   MgO 
D)   KI 
E)   MgO < KI < Ba OF) A) and B)
G) D) and E)

Question 6

What is the mass of 0.500 mol of trichlorofluoro methane,C Cl3F ?

Accepted Answer

A)   3.64 × 10-3 g
B)   68.7 g
C)   137 g
D)   275 gE) None of the above
F) All of the above

Question 7

What is the empirical formula for a species that is composed of sulfur and oxygen with 57.19% of the mass coming from sulfur?

Accepted Answer

A)   SO
B)   S2O3
C)   S3O2
D)   SO2
E)   S2OF) A) and B)
G) C) and E)

Question 8

Give the formula for calcium hydrogen sulfate.

Accepted Answer

A)   CaHSO4
B)   Ca2(HSO4) 2
C)   Ca2HSO4
D)   Ca(HSO4) 2E) A) and B)
F) All of the above D

Question 9

How can one compound contain both ionic and covalent bonds?
 Give an example.

Accepted Answer

An ionic compound that contains a polyat...

Question 10

Which of the following is a molecular compound?

Accepted Answer

A)   CuCl2
B)   KI
C)   NaNO3
D)   CH2Cl2
E)   RbBrF) A) and D)
G) A) and C)

Question 11

Which of the following reactions is associated with the lattice energy of CaS (ΔH°latt) ?

Accepted Answer

A)   Ca(s)  + S(s)  → CaS(s) 
B)   CaS(s)  → Ca(s)  + S(s) 
C)   Ca2⁺(aq)  + S2⁻(aq)  → CaS(s) 
D)   Ca2⁺(g)  + S2⁻(g)  → CaS(s) 
E)   CaS(s)  → Ca2⁺(aq)  + S2⁻(aq) F) A) and B)
G) B) and E)

Question 12

Define empirical formula.

Accepted Answer

An empirical formula...

Question 13

How many moles of C4H10 contain 9.25 × 1024 molecules of C4H10?

Accepted Answer

A)   65.1 moles C4H10
B)   28.6 moles C4H10
C)   34.9 moles C4H10
D)   46.2 moles C4H10
E)   15.4 moles C4H10F) D) and E)
G) None of the above E

Question 14

A covalent bond is best described as

Accepted Answer

A)   the sharing of electrons between atoms.
B)   the transfer of electrons.
C)   a bond between a metal and a nonmetal.
D)   a bond between a metal and a polyatomic ion.
E)   a bond between two polyatomic ions.F) C) and D)
G) B) and D)

Question 15

Which of the following has the greatest mass?

Accepted Answer

A)   6.02 × 1023 molecules of O2
B)   16.0 g of O2
C)   0. 500 mol of O2
D)   All of the above have the same mass.E) C) and D)
F) All of the above

Question 16

Give the name for P Cl3.

Accepted Answer

A)   phosphorus tri chloride
B)   potassium tri chloride
C)   phosphorus (III)  chloride
D)   phosphorus (II)  chloride
E)   phosphorus chlorideF) D) and E)
G) A) and E)

Question 17

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Accepted Answer

A)   8.59 mL
B)   13.5 mL
C)   7.40 mL
D)   12.4 mL
E)   11.6 mLF) D) and E)
G) C) and D)

Question 18

Identify the compound with the highest magnitude of lattice energy.

Accepted Answer

A)   Mg Br2
B)   Ba Br2
C)   Sr Br2
D)   Ca Br2E) All of the above
F) A) and C)

Question 19

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Accepted Answer

A)   LiF
B)   NaCl
C)   CsI
D)   K Cl
E)   Rb IF) A) and E)
G) B) and D)

Question 20

Write the name for Sn(SO4) 2.Remember that Sn forms several ions.

Accepted Answer

A)   tin (I)  sulfite
B)   tin (IV)  sulfate
C)   tin sulfide
D)   tin (II)  sulfite
E)   tin (I)  sulfateF) C) and D)
G) B) and C) B

Exam 5: Molecules and Compounds

What is the mass of a single bromine molecule,Br2?

Correct AnswerverifiedShow Answer

What is the chemical formula for strontium hydride?

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Write the name for Ba3(PO4) 2.

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Which of the following is an atomic element?

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Place the following in order of increasing magnitude of lattice energy. MgO KI Ba O

Correct AnswerverifiedShow Answer

What is the mass of 0.500 mol of trichlorofluoro methane,C Cl3F ?

Correct AnswerverifiedShow Answer

What is the empirical formula for a species that is composed of sulfur and oxygen with 57.19% of the mass coming from sulfur?

Correct AnswerverifiedShow Answer

Give the formula for calcium hydrogen sulfate.

Correct AnswerverifiedD

How can one compound contain both ionic and covalent bonds? Give an example.

Correct AnswerverifiedAn ionic compound that contains a polyat...View AnswerShow Answer

Which of the following is a molecular compound?

Correct AnswerverifiedShow Answer

Which of the following reactions is associated with the lattice energy of CaS (ΔH°latt) ?

Correct AnswerverifiedShow Answer

Define empirical formula.

Correct AnswerverifiedAn empirical formula...View AnswerShow Answer

How many moles of C4H10 contain 9.25 × 1024 molecules of C4H10?

Correct AnswerverifiedE

A covalent bond is best described as

Correct AnswerverifiedShow Answer

Which of the following has the greatest mass?

Correct AnswerverifiedShow Answer

Give the name for P Cl3.

Correct AnswerverifiedShow Answer

Determine the volume of hexane that contains 5.33 × 1022 molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Correct AnswerverifiedShow Answer

Identify the compound with the highest magnitude of lattice energy.

Correct AnswerverifiedShow Answer

Choose the compound below that should have the lowest melting point according to the ionic bonding model.

Correct AnswerverifiedShow Answer

Write the name for Sn(SO4) 2.Remember that Sn forms several ions.

Correct AnswerverifiedB

What is the mass of a single bromine molecule,Br₂?

Correct Answer
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Write the name for Ba₃(PO₄) ₂.

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What is the mass of 0.500 mol of trichlorofluoro methane,C Cl₃F?

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D

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An ionic compound that contains a polyat...
View Answer

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Which of the following reactions is associated with the lattice energy of CaS (ΔH°_latt) ?

Correct Answer
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An empirical formula...
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How many moles of C₄H₁₀ contain 9.25 × 10²⁴ molecules of C₄H₁₀?

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E

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Give the name for P Cl₃.

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Determine the volume of hexane that contains 5.33 × 10²² molecules of hexane.The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol.

Correct Answer
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Write the name for Sn(SO₄) ₂.Remember that Sn forms several ions.

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B