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Number of moles CO2 produced = 24

Explanation:

Step 1: data given

Number of moles O2 = 35 moles

Number of moles C6H6O = 4 moles

Step 2: The balanced equation

C6H6O + 7O2 → 6CO2 + 3H2O

Step 3: Calculate the limiting reactant

For 1 mol C6H6O we need 7 moles O2 to produce 6 moles CO2 and 3 moles H2O

C6H6O is the limiting reactant. It will completely be consumed (4 moles).

O2 is in excess.

For 1 mol C6H6O we need 7 moles O2

Fo' 4 moles C6H6O we need 4*7 = 28 moles O2

There will remain 35 - 28 = 7 mol O2

Step 4: calculate products

For 1 mol C6H6O we need 7 moles O2 to produce 6 moles CO2 and 3 moles H2O

For 4 moles C6H6O we'll have 4*6 = 24 moles CO2

For 4 moles C6H6O we'll have 4*3 = 12 moles H2O

Number of moles CO2 produced = 24

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