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Chapter 6: Chemical Composition

Chapter 6: Chemical Composition. By: Jessica Walker, Sammie Purcell, Megan Lancaster, Walter Lopez, Andrea Cooper, Stephen Washington. Counting by Weighing . 1. Averaging the mass of similar products. Example : Skittles Average Mass = Total Mass/# of Skittles

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Chapter 6: Chemical Composition

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  1. Chapter 6: Chemical Composition By: Jessica Walker, Sammie Purcell, Megan Lancaster, Walter Lopez, Andrea Cooper, Stephen Washington

  2. Counting by Weighing • 1. Averaging the mass of similar products. • Example : Skittles • Average Mass = Total Mass/# of Skittles 2. Averaging the mass of different objects.Example: Hershey’s Kisses Average Mass = Average mass of Hershey’s Kisses/ Average mass of Skittles

  3. Atomic mass: Counting Atoms by Weighing • AMU = Atomic mass unit • Average atomic mass is on the periodic table. • Example: mass of 1000 carbon atoms=(1000 atoms) • !2.01 amu/atom=12, 010 amu

  4. Moles • Mole=Mol: number equal to the number of carbon atoms in 12.01 grams of carbon (average atomic mass) • 1 mol H= 1.008

  5. Molar Mass • Mass of 1 mol of a substance • Ex: CH4 • Mass of 1 Mol of C= 1 x 12.01g • Mass of 4 mol of H= 4 x 1.008

  6. .El Fin.

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