137 Cs is a common product of nuclear fission. Suppose an accident spills 550 mCi of 137...

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137Cs is a common product of nuclear fission. Suppose an accident spills 550 mCi of 137Cs in a lab room.
a. What mass of 137Cs is spilled?
b. If the spill is not cleaned up, how long will it take until the radiation level drops to an acceptable level, for a room this size, of 25 mCi?

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