Download Factor Label and Density Worksheet

Factor Label and Density Worksheet
Chemistry I PreAP
Name_________________________
Date___________________Pd_____
Show your work, express your answer to the correct number of significant digits.
1.
A red blood cell has a life span of 120. days. How many hectoseconds is this?
Answer_______________
2. Snail fever is the second most common ailment in the world after malaria. Worms in the body
produce 3,000. eggs each day. How many eggs is that per minute?
Answer_______________
3.
Midgets grow to be about 1.2 meters tall. How many inches is this?
Answer_______________
4.
Your heart pumps 6,813 liters of blood every day. How many gallons is this per minute?
Answer_______________
5. Dr. Linus Pauling says that if you take 1500. mg of vitamin C each day, you will have milder and
fewer colds. How many pounds is this per year?
Answer_______________
6.
A football field is 300. feet by 160. feet. What is its area in square meters?
Answer_______________
Answers:
1.) 1.04 x 105 hs
4.) 1.254 gal/min
2.) 2.083 eggs/min
5.) 1.206 lb/yr
3.) 47 in
6.) 4.46 x 103 m2
7. The density of carbon tetrachloride is 1.59 g/mL. An irregularly shaped glass vessel has a mass of
121.3 g when empty and 283.2 g when filled with the liquid, carbon tetrachloride. What is the volume of
carbon tetrachloride in dm3? Hint: 1 L = 1 dm3
(ans: 0.102 dm3)
Answer_______________
8. A block of lead measures 20.00 mm by 30.00 mm by 45.00 mm. Calculate the mass of this block if
the density of lead is 11.35 g/mL. (306.4 g)
Answer_______________
9. Determine which would be heavier: a lead ball with a diameter of 2.00 cm or a cylinder of iron
3.00 cm in diameter with a height of 8.00 cm. Densities are: lead = 11.35 g/cm3, iron = 7.874 g/cm3.
(The iron cylinder’s mass = 445 g; lead mass = 47.5g) (ans: iron 445g, lead 47.5g)
Answer_______________
10. A student measures the density of beechwood as 0.541 g/cm3. The value that appears in the
literature is 0.655 g/cm3. Calculate the percent error. (17.40%)
Answer_______________