Question

If there are three naturally occurring isotopes of the hypothetical element R. The R-64 isotope has a 48.89% abundance and mass of 63.929 amu. The R-65 isotope has a 27.81% abundance and mass of 65.996 amu. The R-67 isotope has a 23.30% abundance and mass of 67.002 amu. Calculate the average atomic mass of the hypothetical element R.

Answer 1

65.21g

Step-by-step explanation:

`(48.89 / 100) * 63.929 = 31.25 \\ (27.81 / 100) * 65.996 = 18.35 \\ (23.3 / 100) * 67.002 = 15.61 \\ 31.25 + 18.35 + 15.61 = 65.21`