Problem: If the amount of 51, used to label red blood cells, in a sample decreases from 1.6 mg to 0.40 mg in 55.4 days, what is the half-life of chromium 51? Express your answer using three significant figures.

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If the amount of 51, used to label red blood cells, in a sample decreases from 1.6 mg to 0.40 mg in 55.4 days, what is the half-life of chromium 51? 

Express your answer using three significant figures.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.

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Based on our data, we think this problem is relevant for Professor Giles' class at VCU.