Question

How many moles of oxygen are needed to produce 9 moles of water in the combustion of ethane? Show your work in the space below.

Answer 1

`10.5\text{ moles}`

Step-by-step explanation:

Here, we want to get the number of moles of oxygen needed to produce 9 moles of water

From the balanced equation, 7 moles of oxygen gave 6 moles of water

x moles of oxygen will produce 9 moles of water

Mathematically therefore:

`\begin{gathered} x*6\text{ = 7}*9 \\ 6x\text{ = 63} \\ x\text{ = }(63)/(6) \\ x\text{ = 10.5 moles} \end{gathered}`