Answer:
The mass percent of copper as element is the same.
Explanation:
First of all we need the reaction that is presented below:
→ 
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 (
) to copper oxide (
), 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 (
) that is a gas and this one will escape for the system.
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Answer:
False.
Explanation:
Humans are made of matter too :)
Both have a continuous light spectra the fluorescent source makes a spectra with more intense bands of mercury
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The violet light is the answer!
20 cups of flour, 30 eggs, and 10 cups of sugar