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Stolemometry Practice POSSIBLE POINTS: 12 2C_(7)H_(6)O_(2)+15O_(2)Leftrightarrow 14CO_(2)+6H_(2)O Philly reacted 120g of Benzoic acid with a surplus of Oxygen gas.If the reaction produced 60g of Carbon dioxide what was Philly's percent yield? 45% 50% 20% 78%
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To calculate the percent yield, we need to determine the theoretical yield of carbon dioxide (CO2) and then compare it to the actual yield.Given information:- Reaction:
- Philly reacted 120g of benzoic acid (C7H6O2) with a surplus of oxygen gas.- The reaction produced 60g of carbon dioxide (CO2).Step 1: Calculate the molar mass of benzoic acid (C7H6O2).Molar mass of C7H6O2 = 7 × 12.01 + 6 × 1.01 + 2 × 16.00 = 122.12 g/molStep 2: Calculate the number of moles of benzoic acid (C7H6O2) reacted.Moles of C7H6O2 = 120g / 122.12 g/mol = 0.983 molStep 3: Calculate the theoretical yield of carbon dioxide (CO2).According to the balanced equation, 2 moles of C7H6O2 produce 14 moles of CO2.Moles of CO2 produced = 0.983 mol C7H6O2 × (14 mol CO2 / 2 mol C7H6O2) = 6.83 mol CO2Molar mass of CO2 = 44.01 g/molTheoretical yield of CO2 = 6.83 mol × 44.01 g/mol = 300.6g CO2Step 4: Calculate the percent yield.Percent yield = (Actual yield / Theoretical yield) × 100%Percent yield = (60g / 300.6g) × 100% = 20%Therefore, the correct answer is
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