Rubidium (87Rb) decays to Strontium (87Sr) with a half-life value of 48.8 billion years. 87Rb is the parent isotope and 87Sr is the daughter isotope. Laboratory analysis of a rock sample showed that there are 0.25ppm of 87Rb and an equal amount of 87Sr in the rock. (ppm: parts per million) Based on the laboratory results, ________________ half-lives have elapsed and the age of the rock is __________.A. 25; 2billion yearsB. 4; 2 billion yearsC. 1; 48.8 billion yearsD. 25; 24 billion yearsE. 0; 0 years

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Answered: Rubidium (87Rb) decays to Strontium…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Rubidium (⁸⁷Rb) decays to Strontium (⁸⁷Sr) with a half-life value of 48.8 billion years. ⁸⁷Rb is the parent isotope and ⁸⁷Sr is the daughter isotope. Laboratory analysis of a rock sample showed that there are 0.25ppm of ⁸⁷Rb and an equal amount of ⁸⁷Sr in the rock. (ppm: parts per million)

Based on the laboratory results, ________________ half-lives have elapsed and the age of the rock is __________.

A. 25; 2billion years

B. 4; 2 billion years

C. 1; 48.8 billion years

D. 25; 24 billion years

E. 0; 0 years

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