VSEPR
Electronegativity
Solids & Liquids
Gas Laws
Misc.
100
Name the electronic geometry around the central atom:
Linear
100
Which is more electronegative,
Br or Cl?
Cl
100
Which type of substance is this: ionic, metallic, or molecular?
Li
Metallic
100
What is STP?
Standard Temperature and Pressure
100
How many valence electrons are present in the molecule below?
8 valence electrons
200
Name the molecular geometry around the central atom.
Tetrahedral
200
Rank from most electronegative to least electronegative:
I, Cs, Br, O
O, Br, I, Cs
200
Which type of substance is this, ionic, metallic, or molecular?
CaBr
Ionic
200
A gas has 1.0 atm pressure and 4.3 L volume. It is compressed to 5.1 atm.
What is the new volume?
0.84 L
200
Does this molecule have net dipole?
No
300
Name the electronic geometry AND molecular geometry around the central atom.
Electronic: Tetrahedral
Molecular: Trigonal Pyramid
300
Using Pauling’s electronegativity table, identify this bond as ionic, covalent, or polar covalent:
Ca-O
Ionic bond
300
What is the strongest intermolecular force present in NH3?
Hydrogen bonding
(It also has dipole-dipole and London dispersion forces.)
300
A gas occupies 20.0 L volume at temperature of 273.15 K. At what temperature will it occupy 10.0 L volume?
137 K
300
What is the formal charge of the oxygen atom on the right?
-1
400
Name the molecular geometry for NCl3
(Hint: draw the structure)
Trigonal pyramid
400
Using Pauling’s electronegativity table, identify this bond as ionic, covalent, or polar covalent:
Al-Cl
Polar covalent
400
Quartz is which type of substance?
(Ionic, metallic, molecular, covalent-network, or a polymer.)
Covalent-Network substance (aka. macromolecule)
400
What is the pressure when gas contains 2.31 moles at temperature of 400.0 K and volume of 3.5 L?
22 atm
400
How many valence electrons are in the cyanide ion, CN−?
10 valence electrons
(9 plus one extra electron)
500
Name the electronic geometry around the central atom: HCN
Linear
500
Determine which is more polar:
Ca-Cl or Ni-Cl
Ca-Cl
500
List from the weakest to strongest intermolecular forces (there are five types).
1. London dispersion forces
2. Dipole-dipole interaction
3. Hydrogen bonding
4. Ion-dipole interaction
5. Ion to ion (aka. electrostatic forces)
500
At what pressure does 4.0 moles of gas at temperature of 97 degree C has a volume of 120.3 L?
1.0 atm
500
Does this molecule have a net dipole?
SiF4
No
(all 4 fluoride atoms are cancelling each other out as they spread evenly - no lone pair, unlike NH3)