Chapter 16 - Chemistry Test

Front 1

The number of electrons shared by two atoms in a double bond is __________

Back 1

Four

Front 2

The number of electrons shared by two atoms in a triple bond is __________

Back 2

Six

Front 3

Which of these is paramagnetic?
BF3 O2- NO2 F2

Back 3

O2- and NO2

Front 4

The molecular geometry of SF2 is __________

Back 4

Bent

Front 5

Which of these molecules would have resonance hybrids?
NO2- CO3= CO

Back 5

NO2- and CO3=

Front 6

What type of hybrid orbitals are found in the C-C bond of C2H2?

Back 6

sp

Front 7

What type of hybrid orbitals are found in a molecule of N2?

Back 7

sp

Front 8

Which of these does NOT follow the octet rule?
NF3 PCl2F3 SF4 SCl2

Back 8

SF4, PCl2F3, and NF3

Front 9

Is the molecule Li2 stable or nonexistant?

Back 9

Stable

Front 10

What is the total number of sigma bonds in an HCN molecule?

Back 10

Two

Front 11

What is the total number of pi bonds in an HCN molecule?

Back 11

Two

Front 12

What energy is required to break a carbon-nitrogen (C-N) bond in kJ?

Back 12

293 kJ

Front 13

Calculate the energy of this reaction: 2 HCl ---> H2 + Cl2

Back 13

2(H-Cl) - (H-H + Cl-Cl) = 2(431) - (436+243) = 184 kJ / 2 mol

Front 14

How many valence electrons are in a molecule of phosphoric acid?

Back 14

32

Front 15

Which of these is nonpolar?
H2O BeCl2 HBr CO2 HCl

Back 15

BeCl2 and CO2

Front 16

Which of these is diamagnetic?
BF3 F2 H2O O2

Back 16

BF3, F2, and H2O

Front 17

A hybridization that is sp3d will produce what shape of molecule?

Back 17

Trigonal Bipyramidal

Front 18

In which orbital (bonding or antibonding) are the lower energy electrons?

Back 18

Bonding

Front 19

Which orbitals overlap to form pi bonds?

Back 19

P

Front 20

One example of a network solid is _______

Back 20

diamond, quartz, or graphite

Front 21

When only one atom provides the pair of bonding electrons, it is called a _________

Back 21

Coordinate covalent bond

Front 22

The total energy required to break the bond between two covalently bonded atoms is known as the __________

Back 22

Bond dissoclation energy

Front 23

True or false: The modern interpretation of resonance is that electron pairs rapidly flip back and forth between various electron dot structures.

Back 23

False

Front 24

True or false: CHemical formulas of molecular compounds show number and type of atoms in each molecule.

Back 24

True

Front 25

True or false: A molecule of Bromine has 6 unshared pairs of electrons.

Back 25

True

Front 26

True or false: A bond in chich one atom contributes both bonding electrons is called a bolyatomic covalent bond.

Back 26

False

Front 27

Is the bonding orbital's energy higher or lower than antibonding?

Back 27

Lower

Front 28

Is the antibonding orbital's energy higher or lower than bonding?

Back 28

Higher

Front 29

True or false: Unshared pairs of electrons affect the shapes of molecules.

Back 29

True

Front 30

True or false: An antibonding orbital is a molecular orbital whose energy is lower than that of the atomic orbitals from which it is formed.

Back 30

False

Front 31

What is the degree od AX2?

Back 31

180

Front 32

What is the degree of AX3?

Back 32

120

Front 33

What is the degree of AX4?

Back 33

109.5

Front 34

What is the degree of AX5?

Back 34

180, 90, and 120

Front 35

What is the degree of AX6?

Back 35

All 90 with central atom