Question #5cafa

Nov 30, 2016

12 moles of oxygen is needed.

Explanation:

We know that it takes 6 moles of oxygen to completely react with 2 moles of propane. Because we want to know how many moles of oxygen need for 4 moles we can calculate it out by ratios.

Let x = number of moles of oxygen to react with 4 moles of propane

$\frac{2}{6} = \frac{4}{X}$

$2 x = 4 \cdot 6$

$2 x = 24$

$x = 12$