3.07 moles of hexane must burn to form 18.4 moles of carbon dioxide.
Moles of any substance is define as the ratio of the given mass to the molar mass of that substance.
Given chemical reaction is:
2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O
From the stoichiometry of the reaction, it is clear that:
2 moles of C₆H₁₄ = produce 12 moles of CO₂
1 moles of CO₂ produced by = 2/12 moles of C₆H₁₄
18.4 moles of CO₂ produced by = 1/6×18.4=3.07 moles of C₆H₁₄
Hence, option (2) is correct i.e. 3.07 moles.
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