Chemistry, 25.03.2021 22:40, cymoneej

PLEASE HELP!! URGENT! AND PLEASE DO EXPLANATION!! The half-life of Lead-214 is 27 minutes. How much of a 169 sample would be left after 81 minutes?

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PLEASE HELP!! URGENT! AND PLEASE DO EXPLANATION!! The half-life of Lead-214 is 27 minutes. How much...