John Son

This page lists questions and answers that were posted by visitors named John Son.

Questions

The following questions were asked by visitors named John Son.

A rock contains 270 mmol of 238 U (t1/2= 4.5*10^9 yr) and 110 mmol of 206 Pb. Assuming that all the 206 Pb comes from decay of the 238 U, estimate the rock’s age.
8 years ago

Answers

The following answers were posted by visitors named John Son.

I know that this is an old thread, but if dilute soln/concd soln, then the answer is negative.
8 years ago