Juliet, Nora, Rio
Data Table:
|
Objects for which mass is determined
|
Measured
masses (g)
|
|
Crucible alone
|
29.9
|
|
Crucible and copper
before heating
|
30.9
|
|
Copper before heating
|
1
|
|
Crucible and copper
after heating
|
31.04
|
|
Copper after heating
|
1.14
|
Questions:
1a. As we heated the
copper, it turned black and powdery.
1b. The copper atoms did remain
the crucible; it was just a chemical reaction that becomes a new substance with
oxygen and copper heated.
2a. It was a chemical
reaction because when copper and oxygen are heated, copper oxide (new
substance) is produced.
2b. The change of color,
but not form and the heating with oxygen led us to our conclusion.
3a. The mass of the
crucible and copper increased after heating compared to before heating.
3b. The mass changed
because of combustion and the new substance that was produced.
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