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The half-life of A-15 is 1.90 seconds. If one had 106 g at the beginning, how many grams would be left after 6.00 seconds has elapsed?

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Answer:

To calculate how many grams of A-15 would be left after 6.00 seconds have elapsed, you can use the concept of radioactive decay and the half-life of A-15.The half-life of A-15 is 1.90 seconds, which means that after every 1.90 seconds, half of the substance will decay. So, we need to find out how many half-lives have passed in 6.00 seconds.Number of half-lives = (time elapsed) / (half-life)

Number of half-lives = 6.00 seconds / 1.90 seconds ≈ 3.16 half-livesNow, we can calculate how much A-15 is left after 3.16 half-lives:Amount remaining = (initial amount) * (1/2)^(number of half-lives)

Amount remaining = 106 g * (1/2)^3.16 ≈ 106 g * 0.125 ≈ 13.25 gSo, after 6.00 seconds have elapsed, approximately 13.25 grams of A-15 would be left.

Step-by-step explanation:

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