5. Copper is made up of Cu-63 and Cu-65. Given copper's atomic weight of 63.546 amu, what is the percent abundance of each isotope?

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

answer: mole of the gas

answer: mole of the gasexplanation:

answerca air mass;