use a piece of paper: how many moles of oxygen are needed to completely react with aluminum in the…

use a piece of paper: how many moles of oxygen are needed to completely react with aluminum in the production of 10.2 moles of aluminum oxide? al + o2 --> al2o3 remember: balance the equation first what is the answer? 13.6 6.8 5.1

use a piece of paper: how many moles of oxygen are needed to completely react with aluminum in the production of 10.2 moles of aluminum oxide? al + o2 --> al2o3 remember: balance the equation first what is the answer? 13.6 6.8 5.1

Answer

Answer:

15.3

Explanation:

Step1: Balance the chemical equation

$4Al + 3O_2\rightarrow2Al_2O_3$

Step2: Determine mole - ratio

The mole - ratio of $O_2$ to $Al_2O_3$ is $3:2$.

Step3: Set up proportion

Let $x$ be the moles of $O_2$. We have $\frac{x}{10.2}=\frac{3}{2}$.

Step4: Solve for $x$

$x=\frac{3\times10.2}{2}=15.3$ moles.