Question
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.
110 mmol of 206 Pb. Assuming that all the 206 Pb comes from decay
of the 238 U, estimate the rock’s age.
Answers
DrBob222
mmols U at finish = 270
mmols Pb at finish = 110
mmol U at start = 380
ln(380/270) = kt
Solve for t
You need k and k = 0.693/t<sub>1/2</sub> = ?
mmols Pb at finish = 110
mmol U at start = 380
ln(380/270) = kt
Solve for t
You need k and k = 0.693/t<sub>1/2</sub> = ?