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InterviewSolution
| 1. |
Define mole..?? |
| Answer» 1 mole is equal to avogadro number of molecules<br>Mole ConceptTerm mole was suggested by Ostwald (Latin word mole = heap)A mole is defined as the amount of substance which contains same number of elementary particles (atoms, molecules or ions) as the number of atoms present in 12 g of carbon (C-12).1 mol = 6.023 * 1023\xa0atoms = one gram-atom = gram atomic mass1 mol = 6.023 * 1023\xa0molecules = gram molecular massIn gaseous state at STP (T = 273 K, p = 1 atm)Gram molecular mass = 1 mol= 22.4 L = 6.022 * 1023\xa0molecules | |