7) Sobre as reações abaixo:
I – Al2O3 + HCl → AlCl3 + H2O
II – SO2 + NaOH → Na2SO3 + H2O
III – BaO4 + HNO3 → Ba(NO3)2 + H2O2 + O2

Os coeficientes estequiométricos de cada uma, será:

A)1,6,2,3 / 2,1,1,1 / 1,1,2,1,1

B)1,3,3,2 / 2,1,2,2 / 1, 2,1,1,1

C)6,1,2,3 / 2,1,2,2 / 2,1,2,2,2

D)1,6,2,3 / 1,2,1,1 / 1,2,1,1,1
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