Question

If copper carbonate system is heated for too short a time, what will you notice for mass percent of copper be too large or too small?

Answer 1

Answer:

The mass percent of copper as element is the same.

Explanation:

First of all we need the reaction that is presented below:

$CuCO_{3 (s)} +Heat$ → $CuO_{(s)} + CO_{2 (g)}$

The mass percent of copper (Cu) as element is the same because of during the reaction the element only transform its nature from copper carbonate ($CuCO_{3 (s)}$) to copper oxide ($CuO_{(s)}$), the latter is a solid and will remain in the system.

On the other hand, you will note that the global percentage mass will be small because of the reaction produce ($CO_{2 (g)}$) that is a gas and this one will escape for the system.  

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