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Element X Decays to Element Y Via Beta Decay with a Half-Life

Question 69

Multiple Choice

Element X decays to element Y via beta decay with a half-life of 0.77 s.Initially there is a sample of pure X and after 2.31 s there are 7 g of Y.What was the mass of the original sample?


A) 1 g
B) 7 g
C) 8 g
D) 14 g
E) 56 g

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