Chemistry The Momentum Of Truth

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Chemistry The Momentum Of Truth

  1. 1. The Moment of Truth Moles & Gases Chemistry Semester I 2008-2009 Mrs. Kuzara
  2. 2. Gases <ul><li>What pressure is exerted by 1.12mol of a gas contained in a 5.75L vessel at 35.5°C? (R=0.0821 L atm/mol K) </li></ul>
  3. 3. Gases
  4. 4. Gases <ul><li>A 250mL sample of neon gas is at a pressure of 760mm Hg and a temperature of 35.0°C. What is its pressure at 231°C if its volume is 150mL? </li></ul>
  5. 5. Gases
  6. 6. Stoichiometry <ul><li>Al 2 O 3 + 3 Fe  2 Al + 3 FeO </li></ul><ul><ul><li>If 25.0g Al 2 O 3 reacts with an excess of Fe, what mass of Al should be produced? </li></ul></ul><ul><ul><li>If the actual yield of Al is 8.84g, what is the percent yield of the reaction? </li></ul></ul>
  7. 7. Stoichiometry
  8. 8. Stoichiometry
  9. 9. Moles <ul><li>The compound methyl butanoate smells like apples. Its percent composition is 58.8% carbon, 9.80% hydrogen and 31.4% oxygen. What is its empirical formula? </li></ul>
  10. 10. Moles

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