Question

If 14 moles of Oxygen burn how many moles of water are created? *

2C2H6
+
702
4CO2 + 6 H2O
A) 12 mol H20
B) 3.5 mol H20
C) 3 mol H20
D) 42 mol H20

Answer 1

A) 12 mol H2O.

Step-by-step explanation:

Hello,

In this case, for the given reaction:

`2C_2H_6+7O_2\rightarrow 4CO_2 + 6 H_2O`

We notice that oxygen is in a 7:6 molar relationship with water, for that reason, the resulting moles of water turn out:

`n_(H_2O)=14molO_2*(6molH_2O)/(7molO_2) \\\\n_(H_2O)=12molH_2O`

Thus, the answer is A) 12 mol H2O.

Best regards.