In this activity, we will be investigating the "mole" and comparing it to other large numbers you know or can find out. You must be applying the factor/label method for all your calculations. You will find a calculator very useful. Each student must pass in their own assignment, and you must show all your work for the underlined numbers. If you look anything up, tell where it was found.
-2. The "bits" I used were called _______________.
-1. How many things make a dozen?
0. How many things make a mole?
1. What is the molecular weight of water?
2. How many grams are there in one mole
of water molecules?
3. How many milliliters make up one mole
of water? (Density of water is 1.0 g/mL)
4. The Milky Way Galaxy contains about 100,000,000,000
stars.
No one has counted them - yet
- so this is an estimate.
Write this number as scientific
notation.
5. How many moles of stars are there in
the Milky Way Galaxy?
From the front of the room, get a bunch of "bits," a triple beam balance, and a graduated cylinder.
6. Fill in the blanks: There are __________
pieces of ____________________ in __________ mL.
7. The mass of these bits is __________
g.
8. Calculate the density of your bits. _______________ (include the label!)
9. How many of your bits are present in
one mole?
10. What volume would one mole of your bits
occupy?
11. What mass would one mole of bits have?
12. The mass of the earth is 5,970,000,000,000,000,000,000,000,000
grams. Write this in scientific notation.
13. How many moles of grams is the Earth's mass?
14. The surface area of the United States (including water)
is 3,787,319 km2.
How deep would one mole of
bits cover the United States?
15. Geologists estimate that the Earth is about 4,500,000,000
years old. Write this in scientific notation.
16. How old is the Earth, in seconds?
17. How many moles of seconds old is the Earth?
18. The moon is 240,000 miles away, on average.
How many meters is this?
| Helpful Conversions | |||
| 60 min = 1 hr. | 24 hr. = 1 day | 365.25 days = 1 yr. | 1 m = 3.28 ft. |
| 1 mL = 1 cm3 | (1 m)3 = (100 cm)3 | (1000 m)3 = (1 km)3 | 5280 ft. = 1 mile |