CHEM133 FINAL EXAM QUESTIONS and ANSWERS VERIFIED

QUESTIONS AND ANSWERS Part 1 of 11 - 0.0/ 0.0 Points

No Questions

Part 2 of 11 - 133 MC Chapter 07 10.0/ 10.0 Points

Question 1 of 35

2.0/ 2.0 Points

Calculate the standard enthalpy of formation (ΔHformation) for LiCl(s) given the following data using the Born-Haber cycle:

ΔHsublimation Li = 155.2 kJ/mol IE1 Li = 520 kJ/mol

Bond energyCl–Cl = 242.7 kJ/mol EACl = 349 kJ/mol

Lattice energyLiCl(s) = 828 kJ/mol

A. 320 kJ/mol

B. 440 kJ/mol

C. -260 kJ/mol

D. -380 kJ/mol

E. -1420 kJ/mol

Feedback: See Chapter 07 Question 2 of 35

2.0/ 2.0 Points

Choose the compound with the most ionic bond.

A. KCl

B. LiF

C. NaCl

D. KF

E. LiCl

Feedback: See Chapter 07 Question 3 of 35

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Use the following bond energies to estimate the enthalpy change for the following reaction, one mole of CH4 with chlorine gas to give CH3Cl and hydrogen chloride.

BEC–H = 414 kJ/mol BEC–Cl = 326 kJ/mol BEH–Cl = 432 kJ/mol BECl–Cl = 243 kJ/mol

A. +101 kJ/mol

B. -101 kJ/mol

C. +106 kJ/mol

D. +331 kJ/mol

E. -106 kJ/mol

Feedback: See Chapter 07 Question 4 of 35

2.0/ 2.0 Points

Atoms having equal or nearly equal electronegativities are expected to form

A. polar covalent bonds

B. covalent bonds

C. nonpolar covalent bonds

D. ionic bonds

E. no bonds

Feedback: See Chapter 07 Question 5 of 35

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What is the formal charge on the central nitrogen atom in the most favorable Lewis structure for the fulminate ion, CNO–, based on minimizing formal charge overall?

A. 0

B. -2

C. +2

D. -1

E. +1

Feedback: See Chapter 07

Part 3 of 11 - 133 MC Chapter 08 OpenStax 10.0/ 10.0 Points

Question 6 of 35

2.0/ 2.0 Points

The configuration (σ2s)2(σ2s*)2(π2p)2 is the molecular orbital electron configuration for the ground state of:

A. B2

B. B22–

C. Be2

D. C2

E. Li2+

Feedback: See Chapter 8 Question 7 of 35

2.0/ 2.0 Points

How many lone electron pairs are in the NH4+ ion?

A. 3

B. 2

C. 1

D. 0

E. 4

Feedback: See Chapter 8 Question 8 of 35

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Elements that can accommodate more than eight electrons in their valence shell occur in period

and above.

A. 3

B. 2

C. 4

D. 5

Feedback: See Chapter 8 Question 9 of 35

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Which of the following substances will display an incomplete octet in its Lewis structure?

A. ICl

B. SO2

C. Cl2

D. CO2

E. NO

Feedback: See Chapter 8