Question

Enter an equation for the formation of Al2O3(s) from its
elements in their standard states.
Express your answer as a chemical equation including
phases.

Answer 1

The compound, solid Al2O3, is formed from solid aluminum and oxygen gas under certain conditions.

Formation of Al2O3

Solid aluminium oxide, Al2O3, is formed from its components elements as follows:

2Al (s) + 3O2 (g) ----------> 2Al2O3 (s)

The state of the aluminum element is solid, that of oxygen is gas, and that of the product, Al2O3, is solid.

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