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Question 18 (Essay Worth 8 points)
(02.05 HC)
During an investigation a scientist heated 2.76 g of silver carbonate till it decomposed to leave a silver residue. The total mass of the silver residue formed was 2.16
g. Does the law of conservation of mass hold true in this case? Use complete sentences to justify your answer based on numerical calculations.
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I don’t need any formulas just need to know if it is or isn’t true to the law of conservation of mass and why.

Respuesta :

quasarJose

Yes, the law of conservation of mass holds.

Explanation:

In every chemical reaction, mass is always conserved. This implies that in chemical reaction, the process proceeds maintaining the same set of atom in the same proportion without new ones forming.

  • From the description given, decomposition of the Silver carbonate will produce a silver residue with the given mass.
  • The other mass that seems lost can be examined to be given off as carbon dioxide gas which is the other product of the reaction and oxygen.
  • Therefore, since the products are silver, carbon dioxide and oxygen, the remaining mass is that of the carbon dioxide and oxygen. It is not lost.

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