Question

What is the relative atomic mass of naturally occuring copper to four decimal places when you are given 69,09% of copper-63 with a relative atomic mass of 62,9298 with 30,91% of copper-65, with a relative atomic mass of 64,9278?

Answer 1

I need your help guyz plz!

Answer 2

0.6906(mass) + 0.3091(mass) = avg mass.

Answer 3

Help guys