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Identify the Representative Particle

Identify the Representative Particle. Aluminum hydrogen sulfide Sodium chloride Aluminum sulfate Sulfur dioxide sodium Hydrogen. Identify the Representative Particles answers. Aluminum Al atoms H 2 S molecules hydrogen sulfide Sodium chloride NaCl fu’s

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Identify the Representative Particle

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  1. Identify the Representative Particle Aluminum hydrogen sulfide Sodium chloride Aluminum sulfate Sulfur dioxide sodium Hydrogen

  2. Identify the Representative Particles answers Aluminum Al atoms H2S molecules hydrogen sulfide Sodium chloride NaCl fu’s Al2(SO4)3fu’s Aluminum sulfate Sulfur dioxide SO2 molecules sodium Na atoms Hydrogen H2 molecules

  3. Using Mole Calculations Mass to Mol

  4. 1 X MM g mol Mass to Mole • Use Molar Mass (g/mol) = MM (note: mol/g = 1/MM) • ( substance g) X mol g Mass divided by Molar Mass = Moles

  5. g mol Mole to Mass • Use Molar Mass (g/mol) = MM • ( substance mol) X g mol X MM Moles multiplied by Molar Mass = Grams

  6. g mol Summary • Molar Mass = MM Mass to Mol: Divide by MM Mol to Mass: Multiply by MM MM X MM

  7. Avogadro’s Principle • Equal volumes of different gases at the same T & P will contain the same number of particles Same # of He atoms as oxygen molecules He O2 Same temperature & pressure

  8. Molar Volume Avogadro 1811 • One Mole of a gas at STP will occupy 22.4 L STP = standard temp & pressure 0oC and 1 atm 22.4 L He O2 32.0 g 4.0 g

  9. What is the volume of 38 g of fluorine gas at STP? • ANS • 22.4 L

  10. What is the volume of 10.09 g of neon at STP? • How many mol of Ne is this? • 0.50 mol • If 1 mol would occupy 22.4 L what volume would this sample occupy? • ANS: 11.2 L (or ½ of what 1 mol occupies)

  11. Summarymol to volume conversionsfor gases X 22.4 mol Vol (L) 22.4

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