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11th grade

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How many uranium atoms are there in 9.5 g of pure uranium? The mass of one uranium atom is 4 × 10−26 kg

  • 11th grade -

    convert 4 × 10−26 kg to grams by multiplying by 1000

    (9.5 g of pure uranium)(1 atom/___g uranium atom)

    notice the grams cancel out and all you're left is the unit atom

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