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CHAPTER 10 BASIC HOMEWORK

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Question 1

Determine the geometry or shape of a MgH2 molecule. Check those statements which are correct.

Help: VSEPR

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

MgH2 : 2+ 2= 4 electrons

Mg : 2 bonds = 2 steric number

2 bonds +  0 lone pairs  = linear 
 

Question 2

Determine the geometry or shape of a BCl2- ion. Hint in general feedback

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

BCl2: 3 + ( 2*7) + 1 =18 electrons 

B: 2 bonds + 1 lone pair = 3 steric number 

2 bonds + 1 lone pair  = bent
 

Question 3

Determine the geometry or shape of a SiF4 molecule. Hint in general feedback
Select one or more:
 Correct
 Correct
 Correct

 

Explanation

 

Question 4

Determine the geometry or shape of a CO2 molecule. Hint in general feedback

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

 

Question 5

Draw the Lewis structure and shape for the phosphine, PH3. Which of the following statements are correct. 

Help: Geometry and shapes

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

 PH3 : 5+ ( 1 * 3) = 8


C: 3 bonds + 1 lone pairs = 4 steric number


3 bonds + 1 lone pair  = trigonal pyramidal

 

Question 6

Draw the Lewis structure and shape for PCl5. Which of the following statements are correct.

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

PCl 5 : 5 +( 7*5) = 40


P: 5 bonds + 0 lone pairs = 5 steric number


5 bonds + 0 lone pair  =trigonal bipyramidal

 

Question 7

Draw the Lewis structure and shape for SF6. Which of the following statements are correct.

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

SF6 : 6 +( 6*7) = 48

P: 6 bonds + 0 lone pairs = 6 steric number

6 bonds + 0 lone pair  = octahedral

 

Question 8

Draw the Lewis structure and shape for XeF4. Which of the following statements are correct.

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

XeF4: 8 +( 4*7) = 36

P: 4 bonds + 2 lone pairs = 6 steric number

4 bonds + 2 lone pairs   = square planar.

 

Question 9

Which of the following statements are correct regarding the BeF2 molecule?

Help: Bond polarity

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

F is polarized with negative charge because it is more electronegative

 

Question 10

Which of the following statements are correct regarding the BeClF molecule?

Hint given in feedback

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

The molecule is linear; however, B-Cl and B-F bond polarities are different. So, they do not completely cancel.

 

Question 11

Which of the following statements are correct regarding the BF2- ion?

Select one or more:
 Correct
 Correct

 

Explanation

The molecule is not linear because the lone pair electron causes the molecule to become bent. 

 

Question 12

Which of the following molecules have a net dipole moment?

Select one or more:
 Correct
 Correct
 Correct
 Correct

 

Explanation

 

 

Question 13

What is the orbital hybridization for the C atom in methane, CH4? For sp3d, you would write sp3d.

Help: Valence bond theory


 

Explanation

Tetrahedral 

 

Question 14

Which statements are correct for the carbon dioxide molecule?

Help: Hybrid orbital properties


Select one or more:
 Correct
 Correct
 Correct
 Correct

 

Explanation

 

Question 15

Draw the Lewis formula for the SF4 molecule. Which statements are correct for this molecule?

Select one or more:
 Correct
 Correct
 Correct

 

Explanation

 

Question 16

Complete the Lewis structure for the following hydrocarbon. Which statements are correct for this compound? 

Select one or more:
 Correct
 Correct
 Correct
 Correct
 Correct
 Correct

 

Explanation

 

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