1. Distillation may be used to separate liquid components in a mixture based on what physical property
of the liquids.
2. Which of the following represents a chemical property of copper metal? (circle one)
a.
b.
c.
d.
Copper metal conducts heat.
Copper metal reacts with nitric acid to produce copper(II) nitrate.
Copper metal melts at 1085°C.
Copper metal conducts electricity.
3. The density of water at 25°C is 0.95838 g/mL. In a laboratory, a student performed three trial
measurements to determine the density of water at 25°C and obtained the following results:
Trial #
Density (g/mL)
1
0.934
2
0.952
3
0.910
The measurements are (circle one)
a.
b.
precise.
accurate.
c.
d.
both precise and accurate.
neither precise nor accurate.
4. Give the length of the black rod in cm to the correct number of significant.
5. Give the correct number of protons, neutrons, and electrons for a 18O2– ion.
6. Using the isotopic generic symbol AZA, give the symbol of an isotope containing 6 protons and 8
neutrons.
7. What type of reaction has a compound and oxygen as reactants?
8. Active metals often form a protective surface film of the oxide that prevents further reaction of the
metal with oxygen in the air. Circle the formula that is incorrect.
a.
b.
Al2O3 is aluminum(III) oxide.
Fe2O3 is iron(III) oxide. d.
c.
Na2O is sodium oxide.
MgO2 is magnesium oxide.
9. Using the oxidation number method, balance the following REDOX equation.
S2O82- +
Cr3+
→
SO22-
+
Cr2O72-
10. Predict the products, checking the product formulas are correct, balance and then give the
type of equation for the following.
a.
NH3
→
b.
Zn +
H3PO4
c.
C2H6S
+
O2 →
11. Assign oxidation numbers to each element in the following REDOX reactions identifying the
substances oxidized and reduced.
Al
+
O2
→
Al2O3
12. Give names and formulas for the following
a. MnO2
a. Iron(III) hydroxide
b. ZnC2H3O2
b. Hydrosulfuric acid
c. HBrO3
c. Dinitorgen monoxide
d. ICl3
d. Zinc hydroxide
13. The speed of light is 3.0 X 108 m/s. How many miles will light travel in a 365 day year?
14. Round 1234567 to
a. 6 significant figures
b. 3 significant figures
c. 1 significant figures
15. Convert the following measurements into scientific notation.
a. 123 cm
b. 12300 cm
c. 123.00 cm
d. 0.123 cm
e. 0.01230 cm
16. Give units for the following types of measurements.
a. Length
b. Volume
c. Density
d. Time
e. Energy
17. A swimming pool measures 50.0 ft by 25 ft and has a depth of 8ft.
a. Find the volume of the pool in cubic meters.
b. How long in hours, will it take to fill the pool if a pump delivers 5.0 gal/min.?