About 35 eVeV is required to produce one ion pair in air. One of the two definitions of roentgen is 0.878×10 -2J/kg deposited by the radiation. Determine the corresponding number of ion pairs per gram of dry air at standard conditions produced by the radiation. Express your answer using two significant figures.

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About 35 eVeV is required to produce one ion pair in air.

One of the two definitions of roentgen is 0.878×10 -2J/kg deposited by the radiation. Determine the corresponding number of ion pairs per gram of dry air at standard conditions produced by the radiation.

Express your answer using two significant figures.

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