Chemistry & Chemical Reactivity
Solutions
Chemistry & Chemical Reactivity
The age of minerals can sometimes be determined by measuring the amounts of 206Pb and 238U in a sample. This determination assumes that all of the 206Pb in the sample comes from the decay of 238U. The date obtained identifies when the rock solidified. Assume that the ratio of 206Pb to 238U in an igneous rock sample is 0.33. Calculate the age of the rock (t1/2 for 238U is 4.5 × 109 years_)
Interpretation: Age of the rock has to be calculated.
Concept Introduction:
Radiocarbon dating: The dynamic equilibrium exists in all living organism by exhaling or inhaling, maintain the same ratio of
Half-life period: The time required to reduce to half of its initial value.
Formula used to calculate half-life:
Given info:
The ratio of
Calculation:
The given
Ratio of the lead-206 and Uranium-238 is
Chapter 25 Solutions
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