define tge term mole of substance
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molecules of a substance is 6.022×10^23 molecules of the same substance. It is exactly equal to the molar masses of the substance in gram molar mass. for example
1 mole of H2= 6.022×10^23 H2 molecules
1 mole of H2= 6.022×10^23 H2 molecules
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the amount of substance containing many elementary as there are atoms in 12 gram of carbon - 12 . the mass of mole of substance equal its relative molecular mass expressed in grams.
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