A laboratory investigation shows that a sample of uranium ore contains 9.61 mg of
_(92)^(238)U
(molar mass
238.05079(g)/(m)ol
) and
2.16mg
of
828Pb
(molar mass
205.97447(g)/(m)o
. Calculate the age of the ore. The hali-life of
_(92)^(238)U
is
4.5\times 10^(9)yr
.

Question

A laboratory investigation shows that a sample of uranium ore contains 9.61 mg of

_(92)^(238)U

(molar mass

238.05079(g)/(m)ol

) and

2.16mg

of

828Pb

(molar mass

205.97447(g)/(m)o

. Calculate the age of the ore. The hali-life of

_(92)^(238)U

is

4.5\times 10^(9)yr

.

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