Determine the mass in grams of CO2 that are produced by the complete reaction of 0.05090 moles of C7H8 (toluene) according to the following combustion reaction: C7H8 + 9 O2 -> 7 CO2 + 4 H2O

Question

I'm having issues with stoichiometry problems and have no idea how to complete something like this. Please help

Answer 1

Hi Ryan - happy to help. It is a series of conversions

First- moles of toluene to moles of CO2 (using the balanced chemical reaction).

Second - moles of CO2 to grams of CO2 (using molar mass of CO2 from the periodic table)

Note - I'm not using any analysis of sig. figs here....

0.05090 moles of Toluene x 7 moles of CO2. x. 44 g CO2 = 15.7 grams of CO2

1 mole Toluene 1 mole of CO2