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tnaveen.kmr Group Title

lecture 2 what is mole ?

  • 9 months ago
  • 9 months ago

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  1. LarryBear Group Title
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    What is a dozen? It is 12 eggs or donuts etc.. But 12 atoms would be very, very few. So the number 6.02 * 10^23 has been chosen as the standard quantity of atoms or molecules. It is called a "mole". Originally it came from the number of particles in 22.4 liters of a gas at STP (standard temperature and pressure). It is the number of atoms in 1 gram of atomic Hydrogen or 2 times that number in 2 grams of molecular hydrogen. I hope this helps.

    • 9 months ago
  2. AGPoN Group Title
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    May I ask a follow-up question? If you have 1 mole of solid NaCl, does that mean one mole of ions (half a mole of Na+, and half a mole of Cl-, making a mole of ions total) or does it mean one mole of the entire formula unit NaCl (which would add up to a mole of Na+ and a mole of Cl-)?

    • one month ago
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