Question 1

How many of the following molecules are polar? XeO₂ SiCl₂Br₂ C₂Br₂ SeCl₆

Accepted Answer

The two polar molecules are SiCl4 and SeCl6 because they have a dipole moment due to the difference in electronegativity between the central atom and the surrounding atoms. XeOS2, CS2Br2, and SeCl4 are nonpolar because the dipole moments cancel out due to the molecular geometry.

Question 2

How many of the following molecules are polar? BrCl₃ CS₂ SiF₄ SO₃

Accepted Answer

The answer of How many of the following molecules are...

Question 3

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₂.

Accepted Answer

The central atom, S, has four electron groups around it, which gives it a tetrahedral electron geometry. However, one of the groups is a lone pair of electrons, which takes up more space than the bonded pairs. This causes the molecular geometry to be bent. Additionally, the molecule is polar due to the asymmetry caused by the lone pair on the central atom. Choice B fits this description.

Question 4

A molecule containing a central atom with sp³d hybridization has a(n)________ electron geometry.

Accepted Answer

A molecule with sp³d hybridization has a trigonal bipyramidal electron geometry, as it involves five hybrid orbitals.

Question 5

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H₂O H₃O^⁺

Accepted Answer

We can determine the bond angle by looking at the geometry of the molecule. HCN has a linear geometry, so the X-A-X angle is 180 degrees. H₂O has a bent geometry with an approximate bond angle of 109.5 degrees. H₃O^⁺ has a trigonal pyramidal geometry with an approximate bond angle of 107 degrees. Therefore, the increasing order of X-A-X bond angles is H₂O < H₃O^⁺ < HCN. Therefore, the best choice is E.

Question 6

Determine the electron geometry,molecular geometry and polarity of N₂O (N central).

Accepted Answer

The answer of Determine the electron geometry,molecular geometry and polarity...

Question 7

Determine the electron geometry,molecular geometry and polarity of TeCl₆.

Accepted Answer

TeCl₆ has six bonding pairs and no lone pairs around the central Te atom, giving it an octahedral electron and molecular geometry. The symmetrical arrangement of identical bonds makes it nonpolar.

Question 8

Place the following in order of increasing dipole moment. I.BCl₃ II.BIF₂ III.BClF₂

Accepted Answer

The answer of Place the following in order of increasing...

Question 9

Identify the number of electron groups around a molecule with a tetrahedral shape.

Accepted Answer

A molecule with a tetrahedral shape has four electron groups, whether they are bonds or lone pairs of electrons. This corresponds to D, which represents four electron groups.

Question 10

How many of the following molecules are polar? PCl₅ COS XeO₃ SeBr₂

Accepted Answer

PCl₅, COS, and SeBr₂ are polar molecules as they have polar bonds and an overall net dipole moment. XeO₃ is not polar as it has symmetrical geometry and no net dipole moment.

Question 11

Determine the electron geometry,molecular geometry and polarity around the O of CH₃OH .

Accepted Answer

The central atom in CH₃OH is O, which is surrounded by four regions of electron density. Therefore, the electron geometry is tetrahedral. However, there are two bonding pairs and two lone pairs, causing the molecular geometry to be bent. The molecule is polar because the two lone pairs on oxygen cause an asymmetrical arrangement of the atoms around the central atom.

Question 12

Determine the electron geometry,molecular geometry and polarity of SF₆ .

Accepted Answer

SF₆ has an octahedral electron geometry and molecular geometry, and it is nonpolar due to its symmetrical shape.

Question 13

Determine the electron geometry (eg),molecular geometry (mg),and polarity of SO₃.

Accepted Answer

SO₃ has a trigonal planar electron geometry and molecular geometry due to three bonding pairs and no lone pairs on the central sulfur atom. The molecule is nonpolar because the dipoles cancel out due to its symmetrical shape.

Question 14

A molecule containing a central atom with sp³ hybridization has a(n)________ electron geometry.

Accepted Answer

The sp³ hybridization corresponds to a tetrahedral electron domain geometry, where there are four bonding domains around the central atom.

Question 15

Determine the electron geometry (eg),molecular geometry(mg)and polarity of XeO₃.

Accepted Answer

The answer of Determine the electron geometry (eg),molecular geometry(mg)and polarity...

Question 16

How many of the following molecules are polar? XeCl₂ COF₂ PCl₄F SF₆

Accepted Answer

XeCl₂ is nonpolar due to its linear shape. COF₂ is polar because of its bent shape and different electronegativities of O and F. PCl₄F is polar due to the presence of one different atom (F) in a trigonal bipyramidal structure. SF₆ is nonpolar because of its octahedral shape. Thus, two molecules are polar: COF₂ and PCl₄F.

Question 17

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Accepted Answer

AsCl₅ has polar covalent bonds due to the difference in electronegativity between As and Cl, but the molecule is nonpolar because it has a symmetrical trigonal bipyramidal shape, causing the dipoles to cancel out.

Question 18

Determine the electron geometry,molecular geometry and polarity of HBrO₂ .

Accepted Answer

The molecule has one central atom (S) surrounded by two bonded atoms (H, Br) and two lone pairs of electrons. This gives a steric number of 4, which suggests a tetrahedral electron geometry. 
The two lone pairs of electrons cause distortion in the molecule and give rise to a trigonal pyramidal molecular geometry. 
The molecule is polar due to the asymmetrical distribution of the lone pairs and bonded atoms, which results in a dipole moment.

Option A is incorrect because trigonal bipyramidal electron geometry does not result in a trigonal planar molecular geometry. 
Option B is incorrect because octahedral geometry usually results in a square pyramidal or square planar molecular geometry. 
Option D is incorrect because a tetrahedral electron geometry does not result in a linear molecular geometry. 
Option E is incorrect because there are lone pairs on the central atom, which cause distortion and prevent a linear molecular geometry.

Question 19

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Accepted Answer

The answer of Choose the compound below that contains at...

Question 20

Place the following in order of decreasing dipole moment.
I.cis-CHCl=CHCl 
II.trans-CHCl=CHCI 
III.cis-CHF=CHF

Accepted Answer

Dipole moment is directly proportional to electronegativity difference between two atoms and distance between them. Here, we have two factors for determining the dipole moment: Electronegativity difference and symmetrical vs asymmetrical placement of atoms.

In cis-CHCl=CHCl and cis-CHF=CHF, the atoms are placed symmetrical to each other, resulting in the highest dipole moment. Hence, III > I.

In trans-CHCl=CHCI, the atoms are placed symmetrically but the electronegativity difference between Cl and I is less than that of Cl and F. Hence, II has a lower dipole moment than I.

Therefore, the order of decreasing dipole moment is III > I > II.

Quiz 10: Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

How many of the following molecules are polar? XeO₂ SiCl₂Br₂ C₂Br₂ SeCl₆

How many of the following molecules are polar? BrCl₃ CS₂ SiF₄ SO₃

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO₂.

A molecule containing a central atom with sp³d hybridization has a(n) ________ electron geometry.

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H₂O H₃O^⁺

Determine the electron geometry,molecular geometry and polarity of N₂O (N central) .

Determine the electron geometry,molecular geometry and polarity of TeCl₆.

Place the following in order of increasing dipole moment. I.BCl₃ II.BIF₂ III.BClF₂

Identify the number of electron groups around a molecule with a tetrahedral shape.

How many of the following molecules are polar? PCl₅ COS XeO₃ SeBr₂

Determine the electron geometry,molecular geometry and polarity around the O of CH₃OH .

Determine the electron geometry,molecular geometry and polarity of SF₆ .

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO₃.

A molecule containing a central atom with sp³ hybridization has a(n) ________ electron geometry.

Determine the electron geometry (eg) ,molecular geometry(mg) and polarity of XeO₃.

How many of the following molecules are polar? XeCl₂ COF₂ PCl₄F SF₆

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Determine the electron geometry,molecular geometry and polarity of HBrO₂ .

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Place the following in order of decreasing dipole moment. I.cis-CHCl=CHCl II.trans-CHCl=CHCI III.cis-CHF=CHF

Quiz 10: Chemical Bonding II: Molecular Shapes, Valence Bond Theory, and

How many of the following molecules are polar? XeO2 SiCl2Br2 C2Br2 SeCl6

How many of the following molecules are polar? BrCl3 CS2 SiF4 SO3

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO2.

A molecule containing a central atom with sp3d hybridization has a(n) ________ electron geometry.

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H2O H3O⁺

Determine the electron geometry,molecular geometry and polarity of N2O (N central) .

Determine the electron geometry,molecular geometry and polarity of TeCl6.

Place the following in order of increasing dipole moment. I.BCl3 II.BIF2 III.BClF2

Identify the number of electron groups around a molecule with a tetrahedral shape.

How many of the following molecules are polar? PCl5 COS XeO3 SeBr2

Determine the electron geometry,molecular geometry and polarity around the O of CH3OH .

Determine the electron geometry,molecular geometry and polarity of SF6 .

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO3.

A molecule containing a central atom with sp3 hybridization has a(n) ________ electron geometry.

Determine the electron geometry (eg) ,molecular geometry(mg) and polarity of XeO3.

How many of the following molecules are polar? XeCl2 COF2 PCl4F SF6

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Determine the electron geometry,molecular geometry and polarity of HBrO2 .

Choose the compound below that contains at least one polar covalent bond,but is nonpolar.

Place the following in order of decreasing dipole moment. I.cis-CHCl=CHCl II.trans-CHCl=CHCI III.cis-CHF=CHF

How many of the following molecules are polar? XeO₂ SiCl₂Br₂ C₂Br₂ SeCl₆

How many of the following molecules are polar? BrCl₃ CS₂ SiF₄ SO₃

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO₂.

A molecule containing a central atom with sp³d hybridization has a(n) ________ electron geometry.

Place the following in order of increasing X-A-X bond angle,where A represents the central atom and X represents the outer atoms in each molecule. HCN H₂O H₃O^⁺

Determine the electron geometry,molecular geometry and polarity of N₂O (N central) .

Determine the electron geometry,molecular geometry and polarity of TeCl₆.

Place the following in order of increasing dipole moment. I.BCl₃ II.BIF₂ III.BClF₂

How many of the following molecules are polar? PCl₅ COS XeO₃ SeBr₂

Determine the electron geometry,molecular geometry and polarity around the O of CH₃OH .

Determine the electron geometry,molecular geometry and polarity of SF₆ .

Determine the electron geometry (eg) ,molecular geometry (mg) ,and polarity of SO₃.

A molecule containing a central atom with sp³ hybridization has a(n) ________ electron geometry.

Determine the electron geometry (eg) ,molecular geometry(mg) and polarity of XeO₃.

How many of the following molecules are polar? XeCl₂ COF₂ PCl₄F SF₆

Determine the electron geometry,molecular geometry and polarity of HBrO₂ .