CEM 141 FINAL EXAM QUESTIONS WITH VERIFIED ANSWERS. A+ GRADE 2025/2026.

CEM 141 FINAL EXAM QUESTIONS
WITH VERIFIED ANSWERS. A+ GRADE
2025/2026.




If one carbon wants 4 bonds, how many bonding orbitals can it have?
A. 1
B. 2
C. 3

D. 4 - ANS D


In graphite how many carbons is each carbon attached to?
A. 2
B. 3
C. 4

D. 5 - ANS B


How many orbitals should "mix" to form 3 bonds?
A. 2
B. 3
C. 4

D. 5 - ANS B


How many different compounds can you draw from C5H12?

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,A. 2
B. 3
C. 4
D. 5

E. 6 - ANS B


What is the formal charge on H for NH4+?
A. +1
B. -1
C. +2
D. -2

E. 0 - ANS E


What is the formal charge on O for OH-?
A. +1
B. -1
C. +2
D. -2

E. 0 - ANS B


What is the formal charge on N for NH4+?
A. +1
B. -1
C. +2
D. -2

E. 0 - ANS A


What is the formal charge on H for OH-?


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,A. +1
B. -1
C. +2
D. -2

E. 0 - ANS E


What is the electron pair geometry for H2O?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS A


What is the shape of H2O?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS D


What is the electron pair geometry for NH3?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS A


What is the shape of NH3?


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, A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS E


What is the electron pair geometry for NH4+?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS A


What is the shape of NH4+?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS A


What is the electron pair geometry for CO2?
A. tetrahedral
B. trigonal planar
C. linear
D. bent

E. trigonal pyramidal - ANS C


What is the shape of CO2?


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