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# Calculation of Half-life and Mass of the Nuclide

CHEM-HEVAMJ

A radiochemist needs a $\text10 \mu \text g$ of $_{ }^{ 64 }{ Cu }$ sample for his experiment.

How much ${ CuSO }_{ 4 }^{ }$ must be ordered, if the delivery takes two weeks from the overseas supplier?

${ t }_{ 1/2 }^{ } =12.8 \ \text{days}$ and the atomic mass of $Cu$ = 64.

A

$11.14\mu \text g$

B

$10.00\mu \text g$

C

$20.00\mu \text g$

D

$21.34\mu \text g$