PART III. PROBLEM SOLVING: Solve what is asked and express your answers in four decimal places. Show your solution and enclose your final answer with a box. 1. Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take to decrease to 30.0% if its original activity? 2. Thorium-234 decays into half every after 25 days. How much is left of a 438g at the end of 6 fortnights? (1 fortnight = 2 weeks)

PART III. PROBLEM SOLVING: Solve what is asked and express your answers in four decimal places. Show your solution and enclose your final answer with a box. 1. Co-60 is used extensively in radiotherapy. Its half-life is 5.27 years. How many years will it take to decrease to 30.0% if its original activity? 2. Thorium-234 decays into half every after 25 days. How much is left of a 438g at the end of 6 fortnights? (1 fortnight = 2 weeks)

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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