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# A layer of peat buried beneath the glacial sediments from ISBN: 9780321910295 34

## Solution for problem 80P Chapter 17

Introductory Chemistry | 5th Edition

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Problem 80P

A layer of peat buried beneath the glacial sediments from the last ice age had a carbon-14 content of 25% of that found in living organisms. How long ago was this ice age?

Step-by-Step Solution:
Step 1 of 2

Solution 80P:

Here, we are going to calculate the old of the ice age.

Step1:

Half life period of the carbon-14 is 5730 years

We know,

t1/2 = k = = = 1.209x 10-4 yr-1

Step 2:

We know,

-kt = ln = ln = -1.3863  = = 1.146645  x 104 yr

= 11466.45 yr

Thus, the ice age is 11466.45 years old.

Note,  if we take, -1.386 instead of -1.3863

Step 2 of 2

##### ISBN: 9780321910295

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