Percentage yield of carbon dioxide

Question

When 19.4g of acetylene c2h2 is allowed to react with excess oxygen, 7.12g of CO2 are formed. What is the percentage yield of carbon dioxide?

Answer 1

Write Balanced Equation C₂H₂ + (5/2)O₂ → 2CO₂ + H₂O

Do the standard 3-step stoichiometry calculation from g of acetylene to g of carbon dioxide: (The theoretical yield)

19.4 g Ac (1 mole / 26 g Ac)(2 moles CO₂/mole Ac)(44 g/mole CO₂) = g CO₂

After that calculation, the per cent yield is the actual yield / theoretical yield x 100

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