What Is a Mole and Why Are Moles Used

What Is a Mole and Why Are Moles Used - word 'mole' than to...

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What Is a Mole and Why Are Moles Used? Answer:   A mole is simply a unit of measurement. Units are invented when  existing units are inadequate. Chemical reactions often take place at levels where  using   grams   wouldn't   make   sense,   yet   using   absolute   numbers   of  atoms/molecules/ions would be confusing, too. Like all units, a mole has to be based on something reproducible. A mole is the  quantity of anything that has the same number of particles found in 12.000 grams  of carbon-12. That number of particles is Avogadro's Number, which is roughly  6.02x1023.  A  mole  of  carbon  atoms is  6.02x1023  carbon  atoms.   A mole of  chemistry teachers is 6.02x1023 chemistry teachers. It's a lot easier to write the 
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Unformatted text preview: word 'mole' than to write '6.02x1023' anytime you want to refer to a large number of things! Basically, that's why this particular unit was invented. Why don't we simply stick with units like grams (and nanograms and kilograms, etc.)? The answer is that moles give us a consistent method to convert between atoms/molecules and grams. It's simply a convenient unit to use when performing calculations. Okay. .. you may not find it too convenient when you are first learning how to use it, but once you become familiar with it, a mole will be as normal a unit as, say, a dozen or a byte....
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This note was uploaded on 11/18/2011 for the course CHEM ch 101 taught by Professor - during the Fall '10 term at Montgomery.

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