Moles and isotopes

Mahopac High School
SAT Chemistry
Mole Activity
What’s the count?
In this activity you will calculate how many beans are in 1 mole as well as the mass of
“beanium” and its isotopes.
1) Record the isotope of “beanium” you are using. (What type of bean are you using)
2) Weigh 1 bean.
3) Calculate the mass of 100 beans.
4) Now count out beans to equal the mass obtained in step #3. (Add to scale in steps)
5) Calculate the mass of 1000 beans, 1,000,000 beans, and 1 mole of beans. Convert to
6) Repeat this procedure for each type of bean in the lab. Make a data table for results.
Mass / moles in a name
In this activity you will calculate the mass and moles of chalk required to write your
name on the board. Chalk is calcium carbonate.
1) Mass a piece of chalk.
2) Write your name on the chalkboard (press hard)
3) Mass the piece of chalk afterwards.
4) calculate the mass change of chalk and the # mole of chalk used to write your name.
Isotopes of beanium.
In this activity you will be provided with an isotope of beanium (different beans in 1
bag). Atomic masses are the weighted average of all the naturally occurring isotopes of
an element.
1) Separate and weigh each isotope of beanium.
2) Calculate the % composition (abundance) of each isotope.
Sketch of
# of atoms of
each isotope
Total mass of
each isotope
mass of a single % aboundance