mols CO2 needed = grams/molar mass = approx 7.9 but I've estimated. You need to do it more accurately as well as all of the numbers that follow.
Using the coefficients in the balanced equation, convert mols CO2 to mols C3H8. That's 7.9 mols CO2 x (1 mol C3H8/3 mols CO2) = 7.9 x (1/3) = about 2.5
Now convert mols C3H8 to grams. That's grams = mols x molar mass = ?
What mass of propane (C3H8) is needed to produce 346g carbon dioxide in the following reaction?
C3H8(g)+5O2(g)---> 3CO2(g) +4H2O(g)
A. 115g C3H8
B. 1.86g C3H8
C. 5075g C3H8
D. 346g C3H8
1 answer
1 answer