Respuesta :

meerkat18
The formula for the given above is obtained by cross multiplying the charges of the given set of atoms. The element with a positive value for the charge should be written first. This may be shown through the formula,
                                     Al2(CO3)2.
Dejanras

Answer is: formula is Al₂(CO₃)₃.

Aluminium carbonate (Al₂(CO₃)₃) has neutral charge. Because aluminium cation has positive charge 3+ and carbonate anion has negative charge 2-, for right chemical formula, we need two aluminium cations and three carbonate anion:

charge of the molecule = 2 · (3+) + 3 · (-2).

charge of the molecule = 0.

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