Physics Help Forum the concept of mole

 Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

 May 23rd 2012, 12:53 AM #1 Junior Member   Join Date: May 2012 Posts: 3 the concept of mole i need to get the hang of the mole concept that , 1.008 g of hydrogen constitutes 1 mole atom, whereas 12g of carbon constitute that 1 mole atom! does it mean that these amounts for H & C contains the Avogadro number of atoms?? does it imply the hydrogen is more denser (or heavier or something crucial) than the carbon as it needs to be only 1 gm of it to be 1 mole?? why does this difference in mole amount (of grams ) happen??
 May 28th 2012, 09:38 AM #2 Senior Member   Join Date: Apr 2008 Location: HK Posts: 886 First, one mole is just like a dozen or a thousand. It just means that we consider a specific quantity, 6.02X10^23. So if you have 2 thousands eggs it means you have 2000 eggs. If you have 1 mole of atoms, it means you have 6.02X10^23 atoms. You can see that with the same number of atoms for 1 g of hydrogen and 12 g of carbon. Then it means that each single atom of carbon is heavier __________________ Good results were achieved and the new task is to become a good doctor.
 May 30th 2012, 03:53 AM #3 Junior Member   Join Date: May 2012 Posts: 3 oh got it.thanks a lot

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