Question- Part 1) In a living organism, the decay of C-14 produces 15.3 disintegrations per minute per gram of carbon. The half-life of C-14 is 5730 years. A bone sample with 2.8 g of carbon has 25.0 disintegrations per minute. How old is the bone sample in years? I acquire the answer to this it was 4453.34.
I want help with the second part
Part 2) What percentage of the atoms of carbon in the biosphere are C-14?
I want you to clarify the chemistry in this above problem.