1.An element consists of three isotopes with masses of 28, 29, & 30 amu. The relative abundances of these three isotopes are 92.23%, 4.67%, & 3.10% respectively. What is the average atomic mass of this element? 2. A naturally occurring element that is 75.53 percent 35 amu and 24.47 percent 37 amu. Calculate the average atomic mass. *
3.Rubidium is a soft, silvery-white metal commonly used to give fireworks their purple color. It has two common isotopes, Rb-85 and Rb-87. If the abundance of Rb-85 is 72.2% and the abundance of Rb-87 is 27.8%, what is the average atomic mass of rubidium?
4.Without doing any calculations, if you were told that an element has 80% of an isotope with a mass of 49 amu and 20% of an isotope with a mass of 51 amu, what would you estimate the average atomic mass to be?