Issued as a cumulative or non-cumulative L/C, the former allows for unused credit amounts to rollover into subsequent periods while the latter maintains a fixed amount of credit available each period.
average atomic mass of magnesium is 24.3 g/mole so 24.3 X 1.56 X1021 / 6.02 X1023 = .063 grams.
The average atomic mass between these two isotopes is 63.546 amu. Calculate the actual atomic mass of 65Cu. 7) Magnesium consists of three naturally occurring isotopes. The percent abundance of. these isotopes is as follows: 24Mg (78.70%), 25Mg (10.13%), and 26Mg (11.7%).