If the half-life of a substance is 5 hours then there will be 1/4 of the substance in 25 hours.
Added by Paula A.
Step 1
Since the half-life of the substance is 5 hours, we divide 25 hours by 5 hours per half-life: 25 hours ÷ 5 hours/half-life = 5 half-lives. Show more…
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