C3H8 + 5O2 --> 3CO2 + 4H2O How many moles of O2 are needed to react with 206 moles of C3H8 combust?

Answer 1

Good news. A moles-to-moles problem can be solved in one step.

The coefficients in the balanced equation show us that for every one mole of C₃H₈ that reacts, 5 moles of oxygen gas must also react. Therefore, the problem may be set up as shown below:

206 mol C₃H₈ X (5 mol O₂ / 1 mol C₃H₈) = _________ mol of O₂