44. Решение задачи по химии №004 497

The radioactive half-life is (at 20 °C) 3.82 days.
²²²Rn->²¹⁸Po+ + 42He
⁸⁶ ⁸⁴
Based on the fact that radioactive decay obeys (some word) of the first order ..
1. Calculate the reaction rate constant
2. Draw a diagram of the change in the amount of radon over time. How many minutes will it take to decompose 90% of radon
3. How many moles of α - particles (helium nuclei) will be released in 10 minutes from 10 g of radon.
4. Calculate the activation energy for this reaction if at a temperature of 25°C the half-life of radon is 91.68 hours.

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