50. Solving a chemistry problem

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50. Solving a chemistry problem

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1. The concentration of tritium atoms in the air is 510-15 mol/l. The half-life of tritium is 12 years. After how many years does 90% of the tritium contained in the air decay, if we exclude the sources of its appearance in the atmosphere?

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If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
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