Answer:
Because density is mass divided by volume and it will always stay the same for a certain substance while mass and volume will always vary.
False.
New elements can't be made by changing netrons of a particular element. This would result in the creation of isotopes of that particular element. We can't consider isotopes as different elements.
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Answer:
Energy added: particles move faster and further apart, and matter expands (state changes from solid to liquid to gas). Energy removed: particles move slower and closer together, and matter contracts (state changes from gas to liquid to solid).
Explanation:
Percent (%) Composition of CuO
Cu = 1 x 50g - Multiply by one as there is one Cu
O = 1 x 12.5g - Multiply by one as there is one O
CuO = 62.5g
% for Cu = 50g over 62.5 multiplied by 100 = 80%
% for O = 12.5g over 62.5 multiplied by 100 = 20%
Final Answer :
<em>Percent (%) Composition of CuO = </em>80% (Cu) & 20% (O)
