This Day In History October 23 2009
- Filed under: Horse Racing News, Horse Racing Results, Horse Racing Tips
- Date: Oct 23,2009
Filed under Pennsylvania by DB Light Happy Mole Day! No, I’m not referring to the little critters that drive gardeners crazy, but to the chemical term. It refers to a standard unit for measuring the amount of a pure substance.The mole is defined as the amount of substance of a system that contains as many “elementary entities” (e.g. atoms, molecules, ions, electrons) as there are atoms in 12 g of carbon-12 (12C).[1]. A mole has 6.0221415×1023[6] atoms or molecules of the pure substance being me
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