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3 years ago

10

32p is a radioactive isotope with a half-life of 14.3 days. if you currently have 38.1 g of 32p, how much 32p was present 9.00 d

ays ago?

1 answer:

AleksandrR [38]3 years ago

3 0

T=14.3 d
m₁=38.1 g
t=9.00 d
m₂-?

m₂=2m₁·e^[-(T-t)ln2/T]

m₂=2·38.1·e^[-(14.3-9)ln2/14.3]=58.94 g
58.94 g ³²P was present 9.00 days ago

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