The half-life of a radioactive material is 12.4 hours. How much of a 750.0 gram sample is left after 62.0 hours? (Round to the nearest hundredth of a gram)

Question

asked Mar 22, 2022 79.2k views

1 Answer

Myo Min Han · Answer 1 · 2022-03-29T02:26:23+0000

Answer:

23 gram remains

Explanation:

62÷12.4=5 half lives

after 5 half lives it has been reduced by 1/2×1/2×1/2×1/2×1/2=1/32

after 62 hours, 1/32×750=23 grams