Question

In the following reaction, how many grams of benzene (C6H6) will produce 42 grams of CO2?
2C6H6 + 15O2 → 12CO2 + 6H2O
The molar mass of benzene is 78.1074 grams and that of CO2 is 44.01 grams.

Answer 1

Step #1

convert grams of CO2 to moles

\[grams CO _{2}*(\frac{ 1 mol }{ 42g }) = moles CO _{2}\]

Step #2
multiply the moles of CO2 by the molar ratio to get the number of moles of C6H6

\[Moles CO _{2}*(\frac{ 2C6H6 }{ 12CO2 )}) = moles of Benzene \]

Step #3

convert moles of Benzene to grams.

Answer 2

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