Chemistry, 23.02.2020 23:01 gtamods402

Shauna was measuring a radioactive substance in the laboratory. She measured 5.0 kg of substance X at noon Tuesday. At noon Thursday, two days later, Shauna measured 1.25 kg of substance X. What is the half-life of substance X? Explain your answer.

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Shauna was measuring a radioactive substance in the laboratory. She measured 5.0 kg of substance X a...