A laboratory investigation shows that a sample of uranium ore contains
7.22mg
of
_(92)^(283)U
(molar mass
238.05079(g)/(m)ol
) and
1.65mg
of
_(82)^(206)Pb
(molar mass
{:205.97447(g)/(m)ol)
. Calculate the age of the ore. The halifife of
_(92)8U
is
4.5\times 10^(9)yr
.

Question

A laboratory investigation shows that a sample of uranium ore contains

7.22mg

of

_(92)^(283)U

(molar mass

238.05079(g)/(m)ol

) and

1.65mg

of

_(82)^(206)Pb

(molar mass

{:205.97447(g)/(m)ol)

. Calculate the age of the ore. The halifife of

_(92)8U

is

4.5\times 10^(9)yr

.

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