farahkamaly farahkamaly 17-01-2023 Chemistry contestada Cobalt-60 has a half-life of about 5.26 years. If a sample has an initial mass of 4.48 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed? a)4 half-lifes b) 3 half-lifes c) 5 half-lifes
