To determine the percentage yield, we need to find the theoretical yield first and then compare it to the actual yield (27g of SO3).
1. Write the balanced chemical equation:
2 SO2 + O2 → 2 SO3
2. Calculate the moles of SO2:
25g SO2 * (1 mol SO2 / 64.07g SO2) = 0.390 mol SO2
3. Calculate the moles of SO3 using the mole ratio:
0.390 mol SO2 * (2 mol SO3 / 2 mol SO2) = 0.390 mol SO3
4. Calculate the theoretical yield of SO3:
0.390 mol SO3 * (80.07g SO3 / 1 mol SO3) = 31.23g SO3
5. Calculate the percentage yield:
Actual yield / Theoretical yield = 27g / 31.23g = 0.865
Percentage Yield = 0.865 * 100 = 86.5%
When 25g of So2 reactants with oxygen, 27g of So3 is formed. What's the percentage yield?
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