What is the net ionic equation for the reaction below?
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Na2SO3(aq) + 2HBr(aq) → 2NaBr(aq) + H2O(l) + SO2(g)
A
Na+ (aq) + Br(aq) → NaBr(aq)
B
SO3- (aq) + 2H+ (aq) → H2O(l) + SO2(g)

it's c. elements are placed in rows based on how may valencies electrons have.

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explanation:  

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