A) S + H2 → H2S
B) O2 + F2 → 2OF2
C) 2S + 3O2 → 2SO3
D) 2Na + H2 → 2NaH
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A) S + H2 → H2S
B) O2 + F2 → 2OF2
C) 2S + 3O2 → 2SO3
D) 2Na + H2 → 2NaH