1. The problem statement, all variables and given/known data Toluene, C7H8, is burned with 30% excess air. A bad burner cause 15% of the carbon to form soot (pure C) deposited on the walls of the furnace, what is the Orsat analysis of the gases leaving the furnace? 2. Relevant equations C7H8 + 9 O2 => 7 CO2 + 4 H2O 30% excess of air What would be the theoretical toluene on which the excess air is based? 3. The attempt at a solution I get lost with the "A bad burner cause 15% of the carbon to form soot (pure C) deposited on the walls of the furnace". If it weren't for that, I could solve this problem easily! I need help with the 15% carbon to soot.