4Na + O2= 2Na20 why
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The substances sodium (Na), oxygen (O2), and sodium oxide (Na2O) participate in this chemical reaction: 4Na + O2 → 2Na2O. "Mass can be neither created nor destroyed", therefore you can't have more mass on one side than another. When sodium is heated in excess of oxygen or air, sodium peroxide (Na2O2) is the product.
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