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Scan_Doc0010 - 3.1.0 Stoichiometric CaLcuLations Amounts of...

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3.1.0 Stoichiometric CaLcuLations: Amounts of Reactants and Products 103 This equation means that 1 mole of C 3 Hg reacts with 5 moles of O 2 to produce 3 moles of CO 2 and 4 moles of H 2 0. To use this equation to find the masses of reactants and prod- ucts, we must be able to convert between masses and moles of substances. Thus we must first ask: "How many moles of propane are present in 96.1 grams of propane?" The molar mass of propane to three significant figures is 44.1 (that is, 3 X 12.01 + 8 X 1.008). The moles of propane can be calculated as follows: 1 mol C 3 Hg 96.1 g...GjHg X = 2.18 mol C 3 Hg 44.1 g...GjHg High Mountains-Low Octane The next time that you visit a gas station, take a moment to note the octane rating that ac- companies the grade of gasoline that you are purchasing. The gasoline is priced according to its octane rating-a mea- sure of the fuel's antiknock properties. In a conventional in- ternal combustion engine, gasoline vapors and air are drawn into the combustion cylinder on the downward stroke of the piston. This air-fuel
• Spring '10
• bill
• Organic chemistry, Internal combustion engine, Gasoline, octane ratings, Rocky Mountain states

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