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Completeaza ecuatiile reactiilor;
a) S+?->Na2S
b)S+?->FeS
c)S+?->Al2S3
d)S+?->SO2
e)S+?->H2S


Răspuns :

a)s+2na=na2s
b)s+fe=fes
c)s+2al=al2s3
d)s+o2=so2
e)s+h2=h2s