4tazaouiamine1r
16.06.2021 •
Chemistry
When copper is heated in air, the solid product that is formed has a greater mass than the original copper. When calcium carbonate is heated in air, the solid product that is formed has less mass than the original calcium carbonate. Why is the mass of the solid product greater in one reaction but less in the other reaction?
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Ответ:
When heated, oxygen reacts with copper to form copper oxide. If this reaction occurs in a sealed container, will the mass of the container and everything in it increase, decrease, or stay the same and why? The mass will increase because a new kind of molecule is formed.
Explanation:
As above, carbonates decompose upon heating to give the metal oxide and carbon dioxide. The mass is lost as carbon dioxide.
Ответ:
Heterogeneous mixture.
(The composition is not uniform.)