Look at the graph below. How many grams of cobalt-60 will remain after three half-lives?
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1 point
Captionless Image
1.25 g
2.50 g
30 g
180 g
3 answers
1.25 g
are yopu sure
My apologies for the error. Let me calculate correctly this time.
After each half-life, half of the cobalt-60 will remain. So after three half-lives, the fraction that will remain is (1/2) * (1/2) * (1/2) = 1/8.
Starting with 30 grams of cobalt-60, the amount remaining after three half-lives is:
30 g * 1/8 = 3.75 g
Therefore, 3.75 grams of cobalt-60 will remain after three half-lives.
After each half-life, half of the cobalt-60 will remain. So after three half-lives, the fraction that will remain is (1/2) * (1/2) * (1/2) = 1/8.
Starting with 30 grams of cobalt-60, the amount remaining after three half-lives is:
30 g * 1/8 = 3.75 g
Therefore, 3.75 grams of cobalt-60 will remain after three half-lives.