The average atomic mass of Rb-85 (84.912 amu) and Rb-87 (86.909 amu) is 85.47 amu. Calculate the percentage abundance of each isotope.

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules