Phosphorus-32 is a commonly used radioactive nuclide in, Ask an Expert

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Phosphorus-32 is a commonly used radioactive nuclide in biochemical research, particularly in studies of nucleic acids. The half-life of phosphorus-32 is 14.3 days. What mass of phosphorus-32 is left from an original sample of 195 mg of Na332PO4 after 30.0 days? Assume the atomic mass of 32P is 32.0

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