I have to hand it to the coal industry.
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10/24/12
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Q. I think your April 1-8 column had an error. You wrote that CO is heavier than air. CO has a molecular weight of 28. Air is mostly N2, which also has a molecular weight of 28. Air also has some O2, which has a molecular weight of 32, so the air mixture is heavier than CO. It should be OK to put the CO detector up high, and not near the floor.
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Monte Leeper
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5/14/10
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