Question

P32 is a radioactive isotope with a half-life of 14.3 days. If you currently have 17.5 g of P32 , how much P32 was present 9.00 days ago

Answer 1

27.07 gm nine days ago

Step-by-step explanation:

17.5 = x (1/2)^9/14.3

x = 27.07 gm