Question

Read the given chemical reaction. C2H6 + O2 → CO2 + H2O How many moles of O2 are required to react completely with 3.2 moles of C2H6? 3.5 moles of O2 6.5 moles of O2 10.4 moles of O2 11.2 moles of O2

Answer 1

Hello!

The answer is: 11,2 moles of O2

Why?

First, we need to balance the equation in order to calculate how many moles reacts,

The balanced equation is:

$2 C2H6 + 7 O2 = 4 CO2 + 6 H2O$

So, from the equation we have that 2 moles of C2H6 reacts with 7 moles of O2, knowing that we can calculate how many moles of O2 are required to react completely with 3.2 moles of C2H6:

$3,2moles(C2H6)*\frac{7 moles (O2)}{2moles(C2H6)} =11,2 moles(O2)$

So, we need 11,2 moles of O2 to react completely with 3,2 moles of C2H6.

Have a nice day!