brandonblanks515 brandonblanks515

08-04-2024
Chemistry

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A nuclear bomb test 56.2 years ago generated Sr-90, which dispersed into the surrounding environment. A soil test today shows 20 micrograms of Sr-90 in a 1-kg sample of soil. How many micrograms of Sr-90 per kg of soil must have been present right after the test blast?

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