Copper is made up of two isotopes, Cu−63 (62.9296amu) and Cu−65 (64.9278amu). Given copper’s atomic weight of 63.546, what is the percent abundance of each isotopes?

Nitrogen is made up of two isotopes, 14-N and 15-N. Given the nitrogen’s atomic weight of 14.007, what is the percent abundance of each isotope?

silver has two stable isotopes with the masses of 106.90509 and 108.9047. the atomic weight of silver is 107.868. what is the percent abundance of each isotope

Copper has two naturally occurring isotopes, ⁶³Cu (isotopic mass 62.9296 amu) and ⁶⁵Cu (isotopic mass 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the percent abundance of each isotope? Report your answer to 5 significant figures.

(a)......................................% ⁶³Cu

(b).......................................% ⁶⁵Cu