Question

CALCULE O NOX DO ATOMOAs H3-Al F3-Ag NO3-Fe2 O3-H2 PO4-

Answer 1

a) H₃  = nox = 0
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b) AlF₃ :

Al = + 3   F = - 1
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b) AgNO₃ :

Ag = +1     N= + 5   O = -2
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c) Fe₂O₃ : 

Fe = + 3   O = -2
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d) H₂PO₄ :

H = + 1    P = +7       O = - 2
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espero ter ajudado!