Mole Concept
Chemistry · मोल संकल्पना · 10 facts
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Mole: SI unit of amount; 1 mole = 6.022x10^23 particles (Avogadro number)
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Avogadro Number = 6.022x10^23; atoms in 12g Carbon-12
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Molar mass = mass of 1 mole in grams = atomic/molecular mass in grams
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1 mole water(H2O) = 18g = 6.022x10^23 molecules
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1 mole gas at STP(0C,1atm) = 22.4 litres
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Moles = mass/molar mass = particles/Avogadro number
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Molar mass: O2=32, CO2=44, NaCl=58.5 g/mol
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Molecular mass = sum of atomic masses of all atoms in molecule
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Empirical formula: simplest ratio; Molecular: actual atoms
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Avogadro: equal volumes of gases at same T,P have equal molecules