What mass of propane (C3H8) is needed to produce 346 g carbon dioxide in the following reaction?

C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(g)

A. 346 g C3H8
B. 115 g C3H8
C. 5075 g C3H8
D. 1.86 g C3H8

3 answers

And another name --
You have the balanced equation.
Convert 346 g CO2 to mols. mol = g/molar mass
Using the coefficients in the balanced equation, convert mols CO2 to mols propane.
Now convert mols propane to grams. g = mols x molar mass. Post your work if you get stuck.
115 g c3hg