Erwin was measuring a radioactive substance in the labatory.?

He measured 8 .0 kg of substance X at noon on Tuesday. At noon on Friday, 3 days later, Erwin measured 1.0 kg of substance X. What is the half- life of substance X?

2007-05-14 08:34:16 · 1 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

1 answers

72 hrs = 3 half lives.

Now you can work out what one half life is.

2007-05-14 08:44:22 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋

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