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In an experiment, 3.0 g of sodium react with 1.0 g of oxygen, forming 4.0 g...

In an experiment, 3.0 g of sodium react with 1.0 g of oxygen, forming 4.0 g of sodium oxide.

Determine the empirical formula for sodium oxide.

Write a balanced chemical equation for this reaction.

PLEASE, give a lot of detail for the balanced chemical equation part. I think it should be Na2 + O -> Na2O, but it keeps saying that is wrong.

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