Introductory Chemistry
Chapters 6 and 9
1. Convert the following:
1a. 45 grams of NaCl to moles of NaCl
1b. 45 grams of CaCl2 to moles of Cl
1c. 250 grams of C6H12 O6 to molecules of C6H12 O6
1d. 4 Kg of PCl5 to atoms of Cl
1e. 30 grams of Au to atoms of Au
1f. 245 grams of NaCl to formula units
2. Determine mass percent for each atoms in the following compounds:
2a. Na3PO4
2b. KMnO4
2c. Ca3(PO4)2
2d. C5H12
3. Calculate the empirical and molecular formula for a compound that contains 85.7% Carbons and 14.3% Hydrogen. The
molar mass of the compound is 112 g/mol.
4. Pick which has the highest frequency?
4a. Blue light or Infrared light
4b. Red light or Ultraviolet
4c. Gamma Rays or Microwaves
5. Give the electron configuration and orbital notation for the following atoms:
5a. S
5b. Cl-
5c. Ge
5d. V
5e. Zn
5f. Sr+2
5g. Tc
Introductory Chemistry
Chapters 9 and 10
1. Which atom has the largest atomic radius?
1a. S or Te
1b. Rb or Na
1c. Se or Ga
1d. Cl- or S-2
1e. I or F
2d. Cs or Xe
2e. C or N
2. Which atom has the largest first ionization energy?
2a. He or Na
2b. Ar of Al
2c. Rb or Sr
3. Draw the Lewis structures for the following elements:
3a. Li
3b. Cl
3c. O
3d. Al+3
3f. I-
3e. B
3g. Xe
4. Draw the Ionic structures for the following:
4a. NaCl
4b. CaCl2
4c. MgO
4d. MgF2
4e. CsBr
5. Draw the covalent structures for the following: (Give the total valence and shape)
5a. H2O
5b. CH4
5c. BH3
5d. NH3
5e. CCl4
6d. CBrH3
6e. C2H6
6. Determine the shape and polarity of the following molecules:
6a. O2
6b. BF3
6c. NCl3
7. Fill in the following chart:
Electron Domains
Lone Pairs
Bonds
2
0
2
3
0
3
3
1
2
4
0
4
4
1
3
Shape