Explanation:
<em><u>SO2 + 2NaOH → Na2SO3 + H2O</u></em>
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Answer:

Explanation:
Hello!
In this case, since the decomposition of potassium chlorate is:

We can see a 2:3 mole ratio between potassium chlorate and oxygen (molar mass 32.0 g/mol), thus, via stoichiometry, we compute the mass of oxygen that are produced by the decomposition of 2.50 moles of this reactant:

Best regards!
I believe it is a solution but I am not Shure