A volcanic eruption melts a large area of rock, and all gases are expelled. After cooling, ""Ar (atomic number 18) accumulates from the ongoing decay of 4"K (atomic number 19) in the rock (t/2 = 1.25 x 10' yr). When a piece of rock is analyzed, it is found to contain 1.33 mmol of 4"K and 'Ar. How long ago did the rock cool? Enter your answer in scientific notation. 40 1.47 mmol of 40 10 (select) + years

A volcanic eruption melts a large area of rock, and all gases are expelled. After cooling, ""Ar (atomic number 18) accumulates from the ongoing decay of 4"K (atomic number 19) in the rock (t/2 = 1.25 x 10' yr). When a piece of rock is analyzed, it is found to contain 1.33 mmol of 4"K and 'Ar. How long ago did the rock cool? Enter your answer in scientific notation. 40 1.47 mmol of 40 10 (select) + years

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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