Mathematics, 12.07.2019 03:20 chem1014

Acertain element has a half life of 2.5 billion years. a. you find a rock containing a mixture of the element and lead. you determine that 55? % of the original element? remains; the other 45? % decayed into lead. how old is the? rock? b. analysis of another rock shows that it contains 5? % of its original? element; the other 95? % decayed into lead. how old is the? rock?

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Acertain element has a half life of 2.5 billion years. a. you find a rock containing a mixture of th...

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