Question

You are given the following balanced chemical equation:C3H8 + 5 O2 --> 3 CO2 + 4 H2OIf 3.58 moles of O2 and excess C3H8 are allowed to react, and this is the only reaction which occurs, how many moles of water should be produced?

Answer 1

C3H8 + 5O2 ===> 3CO2 + 4H2O (our balanced reaction)

Data:

3.58 moles of O2

The text already gives us the excess limiting, C3H8, so O2 is the limiting reactant.

Procedure:

5 moles O2 -------- 4 moles H2O

3.58 moles O2 -------- X

X = 2.86 moles of H2O

Answer: 2.86 moles H2O