CHEM 400 General Chemistry Preparatory Review

Chemistry 400: General Chemistry
Sacramento City College
HW#1: Review to Begin Chemistry 400

Review of Chapter 1

1. Identify a liquid.
   1. definite volume and definite shape
   2. definite volume and no definite shape
   3. no definite shape and no definite volume
2. Identify a solid.
   1. copper
   2. oxygen
   3. water
   4. nitrogen
   5. air
3. Identify a liquid.
   1. oxygen
   2. copper
   3. salt
   4. mercury
   5. sugar
4. Draw each of the three main phases of matter such that it is clear what the differences are in (i) spacing, (ii) order and (iii) speed of particles.
5. Choose the pure substance from the list below.
   1. sea water
   2. sugar
   3. air
   4. lemonade
   5. milk
6. Choose the element from the list below.
   1. sodium chloride
   2. water
   3. carbon dioxide
   4. helium
   5. rust
7. If a solution has a temperature of 355 K, what is its temperature in degrees Celsius?
8. Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when placed in a graduated cylinder.
9. The outside air temperature is 30.0°F, what is the temperature in Kelvin?
10. How many mL are in 2.54 L?
11. How many mm are in 3.20 cm?
12. A person is 64.00 inches tall. How tall is she in cm?
13. If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room? (3 ft = 1 yd)
14. A piece of metal ore weighs 8.25 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore?
15. The diameter of an atom is approximately 1 × 10-10 m. What is the diameter in millimeters?
16. Because of the high heat and low humidity in the summer in Death Valley, California, a visitor requires about one quart of water for every two miles traveled on foot. Calculate the approximate number of liters required for a person to walk 10. kilometers in Death Valley.
17. The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in milligrams for a 115-lb person. 1 lb = 453.59 g.
18. Which of the following measurements has three significant figures?
    1. 1,207 g
    2. 250 g
    3. 006 g
    4. 0250 g
    5. 03750 g
19. A laboratory technician reports that the mass of a growth removed from a patient is 274.06 g. How many significant figures does this measurement contain?
    1. 2
    2. 3
    3. 4
    4. 5
    5. none of the above
20. Which of the following numbers contains four significant figures?
    1. 230,110
    2. 23,011.0
    3. 23010
    4. 0230100
    5. 002301
21. What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures.
    1. 722 cm
    2. 722 cm
    3. 722 cm
    4. 7 cm
    5. 8 cm
22. The volume of a gas sample is recorded as 0.0970 L. How many significant figures is this?
    1. 2
    2. 3
    3. 4
    4. 5
    5. none because this is an exact number