13 divided by 25 -0.52 times -107 =-62.48
12 divided by 25-0.48 times -109-52.32
114amu
5. Uranium has three common isotopes. If the abundance of 2U which has an atomic mass of 233.878 amu is 0.01%, the
abundance of U which has an atomic mass of 234.892 amu is 0.71%, and the abundance of **U which has an atomic
mass of 237.911 amu is 99.28%, what is the average atomic mass of uranium?