Name____________________________
Block: _____ Date: ________________
Moles and Avogadro’s Number
Review your notes to answer the following.
1. What are three ways to measure the amount of something?
2. ____________________ representative particles is a ______________. This number is known
as _______________________________ (hint, it has a guy’s name in it)
3. Summarize the steps to convert from moles to atoms. Don’t forget what you need to do to
your final answer!
Calculate the following problems. Remember to show all your work and finalize your answer (scientific
notation, rounding, and units).
4. How many moles is 2.80 x 1024 atoms of silicon?
5. How many moles is 2.17 x 1023 representative particles of bromine?
6. How many molecules are in 1.14 mol SO3?
a. How many atoms are in SO3?
7. How many molecules are in 1.50 mol of NH3?
8. How many atoms are in 1.75 mol CHCl3?
9. How many molecules are in the following:
a. 2.0 moles
b. 1.5 moles
c. 0.75 moles
d. 15 moles
e. 0.35 moles
10. How many moles are in the following:
a. 6.02 x 10 23
b. 1.204 x 10 24
c. 1.5 x 10 20
d. 3.4 x 10 26
e. 7.5 x 10 19