2. Chalk is composed of Calcium, Carbon and Oxygen. In order to find the molar mass of chalk you need to add one calcium, one carbon and three oxygen atoms. Mass of calcium: g

Mass of carbon: g

Mass of oxygen: g x3 = g

Total molar mass: g/mol

3. Initial mass of one piece of chalk and record your results: __23.3_g

4. Find the final mass of the chalk (g) used to write your names: __13.3__g

5. Determine the amount of chalk (g) used to write your names: g (Initial-Final)

6. Convert the amount of grams of chalk (CaCO3) to moles. (remember to use the molar mass)

7. Now convert the amount of moles to atoms. (remember 1mol=6.02x1023 atoms)