Respuesta :

quasarJose

Answer:

10g

Explanation:

The amount of copper in the heated mass of the new substance produced is still 10g because in any chemical action, mass is always conserved.

  • According to the law of conservation of matter "matter is neither created nor destroyed in a chemical reaction".
  • The change in mass is only due to oxygen gas that combines with the new copper formed or other substances that joined the mass.
  • The substance will still have the same amount of copper as the original one.
  • Since we started with 10g of copper, we end with 10g of copper.

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