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Certain race cars use methanol (CH3OH, also called wood alcohol) as a fuel. The combustion of methanol occurs according to the following equation:
2CH3OH + 3O2 --> 2CO2 + 4H2O
In a particular reaction, 9.8 moles of CH3OH are reacted with an excess of O2. Calculate the number of moles of H2O formed

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Known :

Mole of CH₃OH = 9.8 mole

Coef. of CH₃OH = 2

Coef. of H₂O = 4

Solution :

Mole of H₂O = (Coef. of H₂O / Coef. of CH₃OH) × Mole of CH₃OH

Mole of H₂O = (4/2) × 9.8 mole

Mole of H₂O = 19.6 mole

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