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35 Cards in this Set

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The number of electrons shared by two atoms in a double bond is __________
Four
The number of electrons shared by two atoms in a triple bond is __________
Six
Which of these is paramagnetic?
BF3 O2- NO2 F2
O2- and NO2
The molecular geometry of SF2 is __________
Bent
Which of these molecules would have resonance hybrids?
NO2- CO3= CO
NO2- and CO3=
What type of hybrid orbitals are found in the C-C bond of C2H2?
sp
What type of hybrid orbitals are found in a molecule of N2?
sp
Which of these does NOT follow the octet rule?
NF3 PCl2F3 SF4 SCl2
SF4, PCl2F3, and NF3
Is the molecule Li2 stable or nonexistant?
Stable
What is the total number of sigma bonds in an HCN molecule?
Two
What is the total number of pi bonds in an HCN molecule?
Two
What energy is required to break a carbon-nitrogen (C-N) bond in kJ?
293 kJ
Calculate the energy of this reaction: 2 HCl ---> H2 + Cl2
2(H-Cl) - (H-H + Cl-Cl) = 2(431) - (436+243) = 184 kJ / 2 mol
How many valence electrons are in a molecule of phosphoric acid?
32
Which of these is nonpolar?
H2O BeCl2 HBr CO2 HCl
BeCl2 and CO2
Which of these is diamagnetic?
BF3 F2 H2O O2
BF3, F2, and H2O
A hybridization that is sp3d will produce what shape of molecule?
Trigonal Bipyramidal
In which orbital (bonding or antibonding) are the lower energy electrons?
Bonding
Which orbitals overlap to form pi bonds?
P
One example of a network solid is _______
diamond, quartz, or graphite
When only one atom provides the pair of bonding electrons, it is called a _________
Coordinate covalent bond
The total energy required to break the bond between two covalently bonded atoms is known as the __________
Bond dissoclation energy
True or false: The modern interpretation of resonance is that electron pairs rapidly flip back and forth between various electron dot structures.
False
True or false: CHemical formulas of molecular compounds show number and type of atoms in each molecule.
True
True or false: A molecule of Bromine has 6 unshared pairs of electrons.
True
True or false: A bond in chich one atom contributes both bonding electrons is called a bolyatomic covalent bond.
False
Is the bonding orbital's energy higher or lower than antibonding?
Lower
Is the antibonding orbital's energy higher or lower than bonding?
Higher
True or false: Unshared pairs of electrons affect the shapes of molecules.
True
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.
False
What is the degree od AX2?
180
What is the degree of AX3?
120
What is the degree of AX4?
109.5
What is the degree of AX5?
180, 90, and 120
What is the degree of AX6?
All 90 with central atom