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Use the balanced equation shown below to answer the following questions:C5H12 + 8 O2 ------5 CO2 + 6 H2Oa)How many grams of water are produced from reaction of 75.0 g of C5H12 and 125 g of O2?Group of answer choices52.8 gramnone of the above55.4 grams61.2 grams500.0 grams

Question

Use the balanced equation shown below to answer the following questions:C5H12 + 8 O2 ------5 CO2 + 6 H2Oa)How many grams of water are produced from reaction of 75.0 g of C5H12 and 125 g of O2?Group of answer choices52.8 gramnone of the above55.4 grams61.2 grams500.0 grams

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Solution

Para resolver este problema, sigamos los siguientes pasos:

  1. Balancear la ecuación química: La ecuación ya está balanceada: C5H12+8O25CO2+6H2O \text{C}_5\text{H}_{12} + 8 \text{O}_2 \rightarrow 5 \text{CO}_2 + 6 \text{H}_2\text{O}

  2. Calcular las masas molares:

    • Masa molar de C5H12\text{C}_5\text{H}_{12}: 5×12.01g/mol+12×1.01g/mol=72.15g/mol 5 \times 12.01 \, \text{g/mol} + 12 \times 1.01 \, \text{g/mol} = 72.15 \, \text{g/mol}
    • Masa molar de O2\text{O}_2: 2×16.00g/mol=32.00g/mol 2 \times 16.00 \, \text{g/mol} = 32.00 \, \text{g/mol}
    • Masa molar de H2O\text{H}_2\text{O}: 2×1.01g/mol+16.00g/mol=18.02g/mol 2 \times 1.01 \, \text{g/mol} + 16.00 \, \text{g/mol} = 18.02 \, \text{g/mol}
  3. Calcular los moles de reactivos:

    • Moles de C5H12\text{C}_5\text{H}_{12}: 75.0g72.15g/mol=1.039mol \frac{75.0 \, \text{g}}{72.15 \, \text{g/mol}} = 1.039 \, \text{mol}
    • Moles de O2\text{O}_2: 125g32.00g/mol=3.906mol \frac{125 \, \text{g}}{32.00 \, \text{g/mol}} = 3.906 \, \text{mol}
  4. Determinar el reactivo limitante:

    • Según la ecuación balanceada, 1 mol de C5H12\text{C}_5\text{H}_{12} reacciona con 8 moles de O2\text{O}_2.
    • Para 1.039 moles de C5H12\text{C}_5\text{H}_{12}, se necesitarían: 1.039mol×8=8.312mol de O2 1.039 \, \text{mol} \times 8 = 8.312 \, \text{mol de } \text{O}_2
    • Como solo tenemos 3.906 moles de O2\text{O}_2, O2\text{O}_2 es el reactivo limitante.
  5. Calcular los moles de agua producidos:

    • Según la ecuación balanceada, 8 moles de O2\text{O}_2 producen 6 moles de H2O\text{H}_2\text{O}.
    • Por lo tanto, 3.906 moles de O2\text{O}_2 producirán: 68×3.906mol=2.9295mol de H2O \frac{6}{8} \times 3.906 \, \text{mol} = 2.9295 \, \text{mol de } \text{H}_2\text{O}
  6. Convertir los moles de agua a gramos: 2.9295mol×18.02g/mol=52.8g 2.9295 \, \text{mol} \times 18.02 \, \text{g/mol} = 52.8 \, \text{g}

Por lo tanto, la cantidad de agua producida es 52.8 gramos. La respuesta correcta es: 52.8gram \boxed{52.8 \, \text{gram}}

This problem has been solved

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