Respuesta:
29. [tex]3NaBr + H_{3} PO_{4} = Na_{3}PO_{4} +3HBr[/tex]
30. [tex]3Mg + Fe_{2} O_{3} = 2Fe + 3MgO[/tex]
Saludos.
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Respuesta:
29. [tex]3NaBr + H_{3} PO_{4} = Na_{3}PO_{4} +3HBr[/tex]
30. [tex]3Mg + Fe_{2} O_{3} = 2Fe + 3MgO[/tex]
Saludos.