42Grams-Moles-Ans

42Grams-Moles-Ans - MOLE, AVOGADROS NUMBER AND MOLAR MASS...

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MOLE, AVOGADRO’S NUMBER AND MOLAR MASS GCHEM I CONCEPT PROBLEMS Molar Avogadro’s Compound GRAMS MOLES MOLECULES ATOMS Mass Number Formula MOLAR MASS: grams of element or compound per mole (Example: H 2 O = 18.02g/mole) GRAMS TO MOLES: 10.0 gram H 2 O 1 mole H 2 O = 0.555 moles H 2 O 18.02 grams H 2 O MOLES TO MOLECULES: .555 moles H 2 O 6.022*10 +23 molecules = 3.34*10 +23 molecules H 2 O 1 mole H 2 O MOLECULES TO ATOMS: 3.34*10 +23 molecules H 2 O 2 atoms H = 6.68*10 +23 atoms of H 1 molecules H 2 O 1. MOLAR MASS : Calcium _________ Chloride __35.45 _ Lead ________ Aluminum _________ NH 4 Cl _ 53.49 PbCO 3 ________ ZnCl 2 ________ AgCl __143.32 __ NaNO 3 _________ CO 2 _ 44.01 __ FeCl 2 126.75 TiCl 4 _________ 2. CONVERT GRAMS OF COMPOUND TO MOLES: 10.0 grams NaOH . 8.42 kilo-grams AgC l 1 x 10 3 grs AgCl 1 mole AgCl . = 58.7 moles AgCl 1 kilo-gram AgCl 143.32 grs AgCl 340 milli-grams HCl . 22.5

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This note was uploaded on 07/28/2011 for the course CHM 2045 taught by Professor Eng during the Spring '10 term at UNF.

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42Grams-Moles-Ans - MOLE, AVOGADROS NUMBER AND MOLAR MASS...

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