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MCAT Question of the Day
Q:
An unknown substance was shown to have a half-life of 5.0 seconds. If you observe 12.5 g of the substance after 15.0 seconds, how much of the substance was there initially?
A
12.5 g
B
25.0 g
C
50.0 g
D
100 g
Nuclear Chemistry
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Quantitative Skills
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