Mole Conversions (2).ppt

# Mole Conversions (2).ppt - mole(symbolized mol = 6.02 x...

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mole (symbolized mol ) = 6.02 x 10 23 particles (602,000,000,000,000,000,000,000) Avogadro’s Number (N A ) molar mass – mass (usually in grams) of one mole of a substance

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Moles grams atoms or molecules Molar mass N A = 6.02 x 10 23 Mole Conversions Molar mass N A = 6.02 x 10 23
The mass of one mole of an element is the atomic mass of that element expressed in grams. 1 mol of Cu = 63.5 g 1 mol of S = 32.1 g

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The molar mass of a compound is the sum of the molar masses of its component atoms. (Sum of atomic masses expressed in grams.) 1 mol NaCl Na 23.0 Cl 35.5 58.5 g 1 mol H 2 O 2 H 2(1.0) O 16.0 18.0 g
Practice Problem Calculate the molar mass of KNO 3 K 39.1 N 14.0 3 O 48.0 (3 x 16.0) 101.1 g / mol

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Mole to gram conversions : Mass of 1.50 moles of Cu? 1.50 mole Cu x 63.5 g Cu = 95.3 g Cu 1 mole Cu 1 mole Cu = 63.5 g Cu
Practice Problem What is the mass of 2.50 mol of helium, He? 2.50 mole He x 4.0 g He

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• Spring '14
• SaibalMitra

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