Question

Superman is in some ways a living solar battery; his cells absorb electromagnetic radiation from stars (like Earth's sun). The radioactivity of kryptonite possibly interferes with this process, driving the energy out of his cells in a painful fashion. Long term and high-level exposure to green kryptonite can be fatal to Superman. For this reason, Superman spends a significant amount of time studying kryptonite. He performs an experiment to determine its half-life. He begins with 1.5 mols of kryptonite atoms (9.03E23 atoms). After 15 years, he returns and finds that 5.85E23 kryptonite atoms still remain. What is the half-life of kryptonite? O 24 years 242 years 9.7 years 220 years 267 years

Answer 1

method is 100 % correct

Som Groten mistral alo.of atom No. 7.08X1023 after time is years no of atona SA 5.87X1028 apply decays law Noe ett or -it wo log No 109 (5-85 X10 23 9.03X1033 15*birxulu +0.187 15 When t= Tile = No/2 hence No 2 Glow o e dire odtir 2 크 0.693 x 15 0-187 2 Hence Cluse conswer is years from Yours apten

You can check step by step might be some calculation error but method is correct

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