1. O2- is and example of
a. a cation.
b. an anion.
c. a molecule.
d. an atom.
2. In the reaction HF + H2O ? H3O + + F-
a. HF is the acid and H2O is the base.
b. H2O is the acid and HF is the base.
c. H3O + is the acid and HF is the base.
d. HF is the acid and H3O + is the base.
e. All of the above are true.
3. When burned propane reacts as follows:
C3H8 + 5O2 3CO2 + 4H2O.
How many grams of oxygen are required to react with 120g of propane?
4. The force between two 9 C charges that are 10 meters apart is ____ N.
5. (Considering its position on the periodic table) neon would be expected to have properties most similar to:
a. sodium
b. iron
b. krypton
c. oxygen
d. chlorine
6. ____ are examples of metals.
a. Carbon and potassium
b. Lithium and fluorine
c. Iron and xenon
d. Calcium and magnesium
e. Phosphate and stannate
7. Which of the following reactions is not correctly balanced?
a. 2KClO3 2KCl + 3O2
b. 4Fe + 3O2 4Fe2O3
c. 2HNO3 + Ca(OH)2 Ca(NO3)2 + 2H2O
d. N2 + 3H2 2NH3
e. C3H8 + 5O2 3CO2 + 4H2O
8. What is the hydronium ion concentration of a solution with a hydroxide ion concentration of 1.0 x 10-7 mole per liter?
9. What is the pH of a solution with a hydronium ion concentration of 1.0 x 10-12 mole per liter?
10. The amount of electric current that flows through a lamp that has a resistance of 6 Ohms and is connected to a 1.5-volt battery is ____ amps.