Question 1

Which of the molecules below contain an atom with an expanded octet?

Accepted Answer

A)   I and II
B)   III only
C)   IV only
D)   I, II, and III
E)   All of these molecules have an expanded octet.F) B) and C)
G) B) and D)

Question 2

Chloroform (CHCl3)  is an anesthetic and is also used in the synthesis of ozone damaging refrigerants called CFCs. Which of the following is the Lewis structure for chloroform?

Accepted Answer

A)  3)  is an anesthetic and is also used in the synthesis of ozone damaging refrigerants called CFCs. Which of the following is the Lewis structure for chloroform?   
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G) All of the above

Question 3

What does a ball-and-stick model show clearly that a space-filling model does not?

Accepted Answer

A)   relative atom size
B)   relative bond length
C)   relative bond strength
D)   bond angle
E)   atom identityF) All of the above
G) A) and B)

Question 4

Which of the following elements is the least electronegative?

Accepted Answer

A)   potassium
B)   hydrogen
C)   fluorine
D)   carbon
E)   oxygenF) A) and B)
G) A) and C)

Question 5

What is the ratio of ions in this lattice of lithium (the larger spheres)  and oxygen (the smaller spheres)  in Li2O? 2O?   A)  1 Li:1 O B)  2 Li:1 O C)  2 O:1 Li D)  4 O:5 Li E)  4 Li:5 O" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   1 Li:1 O
B)   2 Li:1 O
C)   2 O:1 Li
D)   4 O:5 Li
E)   4 Li:5 OF) All of the above
G) C) and D)

Question 6

Is chloroform (CHCl3)  a polar molecule?

Accepted Answer

A)   No, all polarities cancel out.
B)   Yes, all molecules with polar bonds are polar.
C)   No, the bonds in chloroform are not polar.
D)   Yes, the polarities do not cancel out.
E)   No, carbon compounds cannot be polar.F) A) and E)
G) A) and D)

Question 7

Electronegativity is a measure of an atom's ability to

Accepted Answer

A)   become an anion.
B)   ionize.
C)   draw electrons to itself in a covalent bond.
D)   accept an electron from a metal.
E)   donate an electron to a nonmetal.F) A) and D)
G) C) and E)

Question 8

Electrons shared between two atoms is a(n)  _______.

Accepted Answer

A)   cation
B)   anion
C)   ionic bond
D)   covalent bond
E)   saltF) A) and E)
G) A) and B)

Question 9

What is the electron geometry of the carbon and the nitrogen in methylamine (CH5N) ?

Accepted Answer

A)   Nitrogen is trigonal planar and carbon is tetrahedral.
B)   Carbon is tetrahedral and nitrogen is bent.
C)   Nitrogen is trigonal pyramidal and carbon is tetrahedral.
D)   Carbon is linear and nitrogen is tetrahedral.
E)   Both of them are tetrahedral.F) None of the above
G) B) and D)

Question 10

Tamoxifen has some key similarities to estradiol. Which of the following statements describes one of the similarities?

Accepted Answer

A)   Tamoxifen has the same structure as estradiol.
B)   Tamoxifen has the same number of atoms as estradiol.
C)   Tamoxifen performs the same function in the cell as estradiol.
D)   Tamoxifen binds to the same receptor as estradiol.
E)   Tamoxifen deforms the shape of the estrogen receptor in the same way as estradiol.F) A) and B)
G) C) and D)

Question 11

Which of the following is a diatomic molecule?

Accepted Answer

A)   N2
B)   NaCl
C)   H2O
D)   CO
E)   Li2OF) C) and D)
G) D) and E)

Question 12

What is the total number of valence electrons in the chloroethylene molecule (C2H3Cl) ?

Accepted Answer

A)   6
B)   18
C)   21
D)   32
E)   62F) All of the above
G) C) and D)

Question 13

In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH5N) ?

Accepted Answer

A)   a double bond
B)   a triple bond
C)   a single electron
D)   a lone pair of electrons
E)   None of the aboveF) C) and D)
G) B) and D)

Question 14

A compound contains magnesium and phosphate. What is the formula unit of this compound?

Accepted Answer

A)   Mg3P2
B)   MgPO4
C)   Mg3(PO4) 2
D)   Mg2(PO4) 3
E)   MgHPO4F) A) and B)
G) All of the above

Question 15

A polar molecule is one that has

Accepted Answer

A)   one large atom and one small atom.
B)   an even distribution of charge.
C)   a positive or negative charge.
D)   a more positive side and a more negative side.
E)   only polar atoms.F) A) and B)
G) B) and E)

Question 16

What is the charge on iron in the ionic compound FeCl3?

Accepted Answer

A)   +3
B)   +1
C)   0
D)   (1) 
E)   (3) F) C) and E)
G) All of the above

Question 17

Which of the bonds in the following molecule are polar covalent?

Accepted Answer

A)   C-H and O-H only
B)   C-O and O-H only
C)   C-O only
D)   C-C and C-O
E)   O-H onlyF) A) and D)
G) B) and E)

Question 18

How many atoms are bonded to the carbon in dichloromethane (CH2Cl2) ?

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) A) and E)
G) C) and E)

Question 19

What is the name of the ionic compound that is composed of calcium and chlorine?

Accepted Answer

A)   calcium dichloride
B)   dicalcium trichloride
C)   dicalcium chloride
D)   calcium chloride
E)   dicalcium dichlorideF) D) and E)
G) A) and E)

Question 20

Which of the following covalent bonds is polar?

Accepted Answer

A)   C-C
B)   C-H
C)   O-Cl
D)   Cl-Cl
E)   Mg-ClF) B) and C)
G) A) and E)

Exam 3: Compounds and Molecules

What is the name of the ionic compound that is composed of calcium and chlorine?

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What is the total number of valence electrons in the chloroethylene molecule (C2H3Cl) ?

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A compound contains magnesium and phosphate. What is the formula unit of this compound?

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Chloroform (CHCl3) is an anesthetic and is also used in the synthesis of ozone damaging refrigerants called CFCs. Which of the following is the Lewis structure for chloroform?

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Which of the following is a diatomic molecule?

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In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH5N) ?

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Which of the molecules below contain an atom with an expanded octet?

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What is the charge on iron in the ionic compound FeCl3?

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Which of the following elements is the least electronegative?

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Tamoxifen has some key similarities to estradiol. Which of the following statements describes one of the similarities?

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What is the electron geometry of the carbon and the nitrogen in methylamine (CH5N) ?

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Which of the bonds in the following molecule are polar covalent?

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How many atoms are bonded to the carbon in dichloromethane (CH2Cl2) ?

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Is chloroform (CHCl3) a polar molecule?

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What is the ratio of ions in this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li2O?

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What does a ball-and-stick model show clearly that a space-filling model does not?

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Electrons shared between two atoms is a(n) _______.

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Electronegativity is a measure of an atom's ability to

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A polar molecule is one that has

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Which of the following covalent bonds is polar?

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What is the total number of valence electrons in the chloroethylene molecule (C₂H₃Cl) ?

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Chloroform (CHCl₃) is an anesthetic and is also used in the synthesis of ozone damaging refrigerants called CFCs. Which of the following is the Lewis structure for chloroform?

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In addition to single bonds, which of the following electron groups are on the nitrogen of methylamine (CH₅N) ?

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What is the charge on iron in the ionic compound FeCl₃?

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What is the electron geometry of the carbon and the nitrogen in methylamine (CH₅N) ?

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How many atoms are bonded to the carbon in dichloromethane (CH₂Cl₂) ?

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Is chloroform (CHCl₃) a polar molecule?

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What is the ratio of ions in this lattice of lithium (the larger spheres) and oxygen (the smaller spheres) in Li₂O?

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