Question 1

Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes.
-O₃ (ozone)

Accepted Answer

The answer of Use VSEPR theory to predict the shape...

Question 2

The bond angle in carbon tetrachloride is 109.5°.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements is correct about the bent structure?

Accepted Answer

A)   The bent structure has three bonding electrons pairs with at least one lone pair around the central atom.
B)   The bent structure is the shape of the ammonia molecule.
C)   The bent structure has bond angles around the central atom very close to the 105°.
D)   All above statements are correct.E) A) and C)
F) A) and B)

Question 4

What is the molecular shape of NO₂-

Accepted Answer

A)   tetrahedral
B)   pyramidal
C)   linear
D)   bentE) A) and C)
F) A) and B)

Question 5

Identify each of the molecules as polar or non-polar.
-H?S

Accepted Answer

A)  non-polar
B)  polarC) A) and B)
D) undefined

Question 6

Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes.
-CO₃2-

Accepted Answer

Question 7

The angle around boron in boron trifluoride is ________.

Accepted Answer

A)   60°
B)   90°
C)   109.5°
D)   120°E) None of the above
F) A) and D)

Question 8

Identify each of the molecules as polar or non-polar.
-HCl

Accepted Answer

A)  non-polar
B)  polarC) A) and B)
D) undefined

Question 9

In which of the three phases of matter would you expect hydrogen bonding between water molecules to be the strongest?

Accepted Answer

A)   solid phase (H₂O Os very close together) 
B)   liquid phase (H₂O Os more separated than solid phase) 
C)   gas phase (H₂O Os much farther apart than liquid phase) 
D)   It is equally strong in all three phases.E) C) and D)
F) A) and C)

Question 10

Which of the following molecules is not linear?

Accepted Answer

A)   hydrogen cyanide
B)   beryllium chloride
C)   boron trifluoride
D)   acetylene, C₂H₂E) None of the above
F) B) and C)

Question 11

Match each of the ions with its corresponding shape.
-HCO?-

Accepted Answer

A)  bent
B)  trigonal planar
C)  linear
D)  pyramidal
E)  tetrahedralF) B) and D)
G) C) and E)

Question 12

Match each molecule with an angle around the central atom.
-acetylene, C?H?

Accepted Answer

A)  105°
B)  107°
C)  120°
D)  118°
E)  109.5°F) 180°G) A) and B)
H) A) and F)

Question 13

Match the shape and number of electron groups at the central atom with the number of bonding pairs of electrons on the central atom.
-bent, four

Accepted Answer

A)  4
B)  3
C)  2D) B) and C)
E) All of the above

Question 14

Identify each of the molecules as polar or non-polar.
-CH?

Accepted Answer

A)  non-polar
B)  polarC) A) and B)
D) undefined

Question 15

Identify each of the molecules as polar or non-polar.
-Br2

Accepted Answer

A)  non-polar
B)  polarC) A) and B)
D) undefined

Question 16

In a molecule having three pairs of electrons around a central atom and a trigonal planar shape, how many lone pairs of electrons does the central atom have ?

Accepted Answer

A)   1
B)   0
C)   2
D)   3E) B) and C)
F) A) and C)

Question 17

Match each molecule with its shape of the central atom.
-sulfur dioxide

Accepted Answer

A)  linear
B)  trigonal plamar
C)  tetrahedral
D)  bent
E)  trigonal planarF) pyramidalG) A) and B)
H) B) and E)

Question 18

Carbon dioxide contains polar bonds and is a nonpolar molecule.

Accepted Answer

A) True 
 B)False

Question 19

Match each molecule with an angle around the central atom.
-boron trifluoride

Accepted Answer

A)  105°
B)  107°
C)  120°
D)  118°
E)  109.5°F) 180°G) A) and E)
H) A) and F)

Question 20

Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes.
-CS2

Accepted Answer

Exam 6: The Shape of Molecules

Identify each of the molecules as polar or non-polar. -CH?

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Carbon dioxide contains polar bonds and is a nonpolar molecule.

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Match each molecule with an angle around the central atom. -acetylene, C?H?

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Identify each of the molecules as polar or non-polar. -Br2

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Match each of the ions with its corresponding shape. -HCO?-

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In which of the three phases of matter would you expect hydrogen bonding between water molecules to be the strongest?

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Match each molecule with an angle around the central atom. -boron trifluoride

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What is the molecular shape of NO₂-

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Match the shape and number of electron groups at the central atom with the number of bonding pairs of electrons on the central atom. -bent, four

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The angle around boron in boron trifluoride is ________.

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Which of the following molecules is not linear?

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Match each molecule with its shape of the central atom. -sulfur dioxide

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Identify each of the molecules as polar or non-polar. -HCl

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Which of the following statements is correct about the bent structure?

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In a molecule having three pairs of electrons around a central atom and a trigonal planar shape, how many lone pairs of electrons does the central atom have ?

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Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes. -O₃ (ozone)

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The bond angle in carbon tetrachloride is 109.5°.

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Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes. -CS2

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Identify each of the molecules as polar or non-polar. -H?S

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Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes. -CO₃2-

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Identify each of the molecules as polar or non-polar. -Br₂

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Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes. -CS₂

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Use VSEPR theory to predict the shape of the molecule or complex ion shown. Draw a Lewis dot structure to assist you in determining these shapes. -CO₃^2-

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