How many moles of Al(2)O(3) will be form...

How many moles of `Al_(2)O_(3)` will be formed when a mixture of `5.4g` of `Al` and `3.2g` of `O_(2)` is heated?

(1) `(1)/(10)`

(2) ` (1)/(15)`

(3) `(1)/(5)`

(4) `(1)/(20)`

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