Which one is a chemical reaction? Why?
1 answer:
Answer:
Copper turns green on exposure to air
Explanation:
Liquid water freezes to form ice: Physical change
Reason: Water can melt back when it becomes ice.
Copper turns green on exposure to air: Chemical change
Reason: The copper can not change back from the green state when it turns green.
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The charge of an electron has a negative charge (-), while protons have a postivie (+) charge.
A)Nitrogen (IV) oxide
B)propane
Spectroscopy because it talks about the study of spectrum of light.
Answer:
A- Non-magnetic
Explanation:
Brass, rubber, plastic, and glass will not be attracted by a magnet.
The direction of heat flow is increased which means blocks temperature is higher and hotter than it was before
