Question

. Calculating The half-life of iron-59 is 44.5 days.

After 133.5 days, 2.76 g of iron-59 remains.
What was the mass of the original sample?


-SOMONE JUST PLEASE HELPP ME IM LITERALLY STUCK!!

Answer 1

Answer: Just in case your still stuck, The half-life of iron-59 is 44.5 days, which means that half of the original sample will decay in that amount of time. After 133.5 days, 2.76 g of iron-59 remains. To find the original mass of the sample, we need to know how many half-lives have passed.

133.5 days / 44.5 days/half-life = 3 half-lives

After three half-lives, the remaining mass is 1/8 of the original mass. Therefore,

2.76 g * 8 = 22.08 g

The original mass of the sample was 22.08 grams.

Hope this helps you now or later on :)