Nuclear fusion & nuclear fission answers

IB Chemistry: Nuclear fusion & nuclear fission answers

(b) t½ = (ln 2) / λ = 0.693 / λ so λ = 0.693 ÷ 23.5 = 0.0295 min-1N = Noe−λt so N / No = e−(0.0295 x 141) = 0.0156Percentage remaining = (N / No) x 100 = 1.56%.This can more easily be solved by inspection.141 minutes is equal to 6 half-lives. 1 → 0.5 → 0.25 → 0.125 → 0.0625 → 0.03125 → 0.0156 (i.e. 1.56 %)(c) Three neutrons produced since:2. Each element has its own specific absorption spectrum...


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