Question

How many moles of O2 is needed to produce 14 moles of H2O

Answer 1

14 moles of O2.

Step-by-step explanation:

You can see that in the chemical reaction, 2 moles of O2 reacted, produces 2 moles of H2O. You can realize that the molar ratio between these two compounds is 1:1, this means that if we react 2 moles of oxygen with CH4, we will produce 2 moles of H2O, or if we want to react 5 moles of oxygen with CH4, we will produce 5 moles of H2O. You can see this better, like this:

`\begin{gathered} 2\text{ moles O}_2\rightarrow2\text{ moles H}_2O \\ ?\text{ moles O}_2\rightarrow14\text{ moles H}_2O. \end{gathered}`

The calculation of this rule of three can be visualized:

`14\text{ moles H}_2O\cdot\frac{2\text{ moles O}_2}{2\text{ moles H}_2O}=14\text{ moles O}_2.`

We need 14 moles of O2 to produce 14 moles of H2O.