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Steps: 1.Identify formula 2.Find atomic mass of element in periodic table 3.Identify the number of atoms of each element in the formula 4.Multiply the.

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Presentation on theme: "Steps: 1.Identify formula 2.Find atomic mass of element in periodic table 3.Identify the number of atoms of each element in the formula 4.Multiply the."— Presentation transcript:

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2 Steps: 1.Identify formula 2.Find atomic mass of element in periodic table 3.Identify the number of atoms of each element in the formula 4.Multiply the atomic wt of the element by the # of atoms of that element in the formula to find the mass of that element in the formula. 5.Add the individual masses together to get the formula mass.

3 Percent Composition Probs 1 winter 2011 –do all work in your comp book MineralChemical formula MalachiteCu Cu 2 CO 3 (OH) 2 CO 3 (OH) magnetiteFe Fe 3 O 4 O HaliteNaCl CalciteCaCO 3 FlouriteCaF 2 CassiteriteSnO 2 GraphiteC MuscoviteKAl KAl 2 (AlSi 3 O 10 )(OH) 2,Si OH CupriteCu 2 O

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