Question

4al + 3o₂ → 2al₂o₃
9.30 mol al|?|?|? g o₂
what conversion should be used in the green boxes?
2 mol al₂o₃/4 mol al
3 mol o₂/4 mol al
4 mol al/3 mol o₂

Explanation:

Step1: Analyze the chemical equation

From the balanced chemical equation \(4\text{Al}+3\text{O}_2
ightarrow2\text{Al}_2\text{O}_3\), we need to convert moles of \(Al\) to moles of \(O_2\).

Step2: Determine the mole - ratio

The mole - ratio of \(O_2\) to \(Al\) is \(3\) moles of \(O_2\) for every \(4\) moles of \(Al\). So the conversion factor is \(\frac{3\space mol\space O_2}{4\space mol\space Al}\)

Answer:

\(\frac{3\space mol\space O_2}{4\space mol\space Al}\)