When carbon is burned in ar it reacts with oxygen to form carbon dioxide. When 21.6g of carbon were burned in the presence of 72.8 g, 15.2 g of oxygen remained untraced. What mass of carbon dioxide was produced?

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

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yes the answer is total mass in unchanged   : )