How many decompositions per minute should you expect to observe in 200g of a certain wine?
2019-03-19 1:19 pm
Normal water contains enough tritium (3H) to show 5.5 decompositions per minute per 100. g of water. Tritium has a half-life of 12.3 years. A friend has a bottle of vintage Cabernet Sauvignon wine that claims to have been produced 50 years ago. How many decompositions per minute should you expect to observe in 200 g of that wine? Assume that the wine is made of pure water for this problem.
回答 (1)
2019-03-19 2:38 pm
✔ 最佳答案
Number of half-lives = (50 years) / (12.3 years) = 4.065(5.5 decompositions per min / 100 g) × (200 g) × (1/2)⁴˙⁰⁶⁵ = 0.66 decompositions per min
(to 2 sig. fig.)
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