Purpose of the Lab The purpose of this lab was to practice our abilities of finding the total and average mass of isotopes, determining percent and decimal abundance, and finding the average atomic mass. We did this with a given random combination of skittles, m&m's, and pretzel m&m's. Average Atomic Mass (0.603x0.864)+(0.30x1.02)+(0.10x2.09) = 1.036 = 1.0. Conclusions 1. Ask a group nearby what their average atomic mass was. Why would your average atomic mass be different than theirs? The other group's average is 1.23. Our average atomic mass might be different because each isotope--skittles, m&m's, and pretzel m&m's--had a different total number, and thus a different total and average mass. This affected the average mass because the formula for it, average atomic mass = (decimal abundance of isotope 1 x mass of isotope 1) + (decimal abundance of isotope 2 x mass of isotope 2) + (decimal abundance of isotope 3 x mass of is...
Purpose and Summary The purpose of this lab was for students to practice identifying substances using limited information. In this particular lab, the mass, number of moles, and number of particles were given. From this lab, students can also understand the concepts of moles and the relationships between moles and molar mass. Each group was given a bag, either from Set A or Set B, that held an unknown substance. After the group identified the substance, they had to solve a bag from the different set. The bags also had information for clues: Bag A had the mass of the empty bag and the number of moles, and Bag B had the mass of the empty bag and the number of particles listed. Answers A6 is Sodium Chloride. B6 is Zinc Oxide. Determining the Identity My partner and I first recieved the bag B6 from Set B. We started off by first weighin...
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