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Radium decomposes in air at the rate proportional to the present amount. It is found that in 20 years, 1.2% of a certain amount decomposed. Determine approximately how long will it take: a.) For one half life of the original amount to decompose? b.) 25% of the amount to decompose. c.) What percent of the amount will decompose in 50 years?

Radium decomposes in air at the rate proportional to the present amount. It is found that in 20 years, 1.2% of a certain amount decomposed. Determine approximately how long will it take: a.) For one half life of the original amount to decompose? b.) 25% of the amount to decompose. c.) What percent of the amount will decompose in 50 years?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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in air at Radium decomposes the rate proportional to the present amount. It is found that in 20 years, 1.2% of a certain amount decomposed. Determine approximately how long will it take: a.) For one half life of the original amount to decompose? b.) 25% of the amount to decompose. c.) What percent of the amount will decompose in 50 years?
Transcribed Image Text:in air at Radium decomposes the rate proportional to the present amount. It is found that in 20 years, 1.2% of a certain amount decomposed. Determine approximately how long will it take: a.) For one half life of the original amount to decompose? b.) 25% of the amount to decompose. c.) What percent of the amount will decompose in 50 years?
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