39. (A) In the actual O 3 molecule the best description of the number of bonds b

Question

39. (A) In the actual O3 molecule the best description of the number of bonds between O-O atoms is ____ bonds.
CHOICES: 1, 1.5, 2, 2.5, 3
(B) In the actual CO2 molecule the best description of the number of bonds between C-O atoms is _______ bonds.
CHOICES: 1, 1.5, 2, 2.5, 3
(C) In the actual HCO2- ion the best description of the number of bonds between C-O atoms is  ______ bonds. CHOICES: 1, 1.5, 2, 2.5, 3

40. Calculate the formal charges for the atoms specified in the two structures below and fill in the blanks.

The formal charges on the specified atoms are:
1 ____ 2 _____ 3 ______ 4 _______ 5 _______
Based on the formal charges which of the two Lewis stuctures A or B is more likely to represent the actual BF3 molecule? _________

Explanation / Answer

39) A

1.5

because O- is in conjugation

39 B

answer is 2

39 C

answer is 1.5

40

1 is Zero

2 is Zero

3 is -1

4 is +1

5 is Zero

structur B is more stable

because in structure B all the electrons are obeyed octet rule.

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