Chem 2202 1. Determine the average atomic mass for each of the following: Isotope name Percent abundance Average Atomic Mass a. carbon-12 98.9% carbon-13 1.1% carbon-14 1.0 x 10-10% b. oxygen-16 99.762 oxygen-17 0.038 oxygen-18 0.2 2. Calculate the average atomic mass of an element. For example, there are two isotopes of boron (boron-10 and boron-11). What is the average atomic mass of boron if boron-10 has a percent abundance of 19.88% while boron-11 has a percent abundance of 80.22%? 3. There are two naturally occurring isotopes of chlorine: chlorine-35 and chlorine-37. Determine the average atomic mass of chlorine if the relative abundance of chlorine atoms in nature is 75% chlorine-35 and 25% chlorine-37? 4. The average atomic mass of hydrogen is 1.01. Which isotope of hydrogen do you think is most abundant in nature? Why?
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