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A 1.50- gas sample at 722 and 25.0 contains 7.56 radon-220 by volume. Radon-220 is an alpha-emitter with a half-life of 55.6s
Sep 21, 2012

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You need units for the numbers and you need to ask a question.
Sep 22, 2012

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A 1.50 liter gas sample at 745mm HG and 25 celsius contains 3.55% radon by volume radon-220 is an al... A 1.50- gas sample at 722 and 25.0 contains 7.56 radon-220 by volume. Radon-220 is an alpha-emitter... Radon-222 is an isotope that undergoes radioactive decay. For a sample initially containing 450milli... Radon-222 is an isotope that undergoes radioactive decay. For a sample initially containing 450milli...
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