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Chemistry
Chemistry
Problem
5 mg of
Na
3
PO
4
\text{Na}_3\text{PO}_4
Na
3
PO
4
contains
P
32
\text{P}^{32}
P
32
(15.6% of sample) and
P
31
\text{P}^{31}
P
31
atoms. Assuming only
P
32
\text{P}^{32}
P
32
atoms radioactive, calculate the rate of decay for the given sample of
Na
3
PO
4
\text{Na}_3\text{PO}_4
Na
3
PO
4
. The half-life period for
P
32
=
14.3
day
\text{P}^{32} = 14.3 \text{ day}
P
32
=
14.3
day
; molar mass of
Na
3
PO
4
=
161.2
\text{Na}_3\text{PO}_4 = 161.2
Na
3
PO
4
=
161.2
.
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