Question

what is the empirical formula for this compound? al₆o₉ al₃o₂ al₂o₃ al₆o₉

Explanation:

Step1: Find the greatest common divisor (GCD)

The GCD of \(6\) and \(9\) is \(3\).

Step2: Divide the sub - scripts by the GCD

For \(Al\): \(\frac{6}{3}=2\). For \(O\): \(\frac{9}{3}=3\).

Answer:

\(Al_2O_3\)