what mass of carbon would be produced when 1 mole of H8C3 burns completly ?thank you?

Question

am sorry it was not carbon ,it was carbondioxide!!!!!!1

Answer 1

If you completely combust propane (C3H8), there will be NO elemental carbon produced or remaining.

The reaction for combustion of propane is:

C3H8 + 5 O2 ===> 3 CO2 + 4 H2O

Notice, there is no Carbon (C) by itself -- all the carbon is tied up as carbon dioxide.

Now, one mole of propane has 3 moles of carbon, and likewise three moles of carbon dioxide contains three moles of carbon. So the mass of carbon on BOTH sides of the reaction equation will remain the same -- 3 moles C x 12 grams/mole = 36 grams of carbon on both sides of the equation.

Look over your question a little more carefully -- and then decide which of those two answers it is really looking for.