Question

If a sample of copper contains 69.1% of 63Cu of
isotopic mass 62.930 u and 30.9% of 65Cu of isotopic
mass 64.928 u. Calculate the relative atomic mass
of copper.​

Answer 1

Answer:

You will need to use your periodic table. ... Calculate the (average) atomic mass of boron. ... Copper has two isotopes: Cu-63 ( abundance = 69.2%, mass = 62.930 amu) and Cu-65