1. Write down letter of your group:
2. Calculate the mass you need to weigh out the correct number of moles for the substance.
3. Get a zip lock plastic bag, using a permanent marker, write names of group members, info from letter & letter, and mass of weighed.
4. On the data table below, record the mass of the plastic bag (after writing).
5. Mass out the correct amount of the substance and close the zip lock bag.
6. Hand in the bag to the teacher.