Physical property
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Answer:
In the presence of UV light, ethane will react with bromine in a substitution reaction. UV light is the condition under which the reaction will occur so it is written above the arrow in the chemical equation. As the reaction proceeds, the intensity of the re-brown colour of the bromine water decreases.
Answer:
This is the change of one type of matter into another type of matter
Answer:
Inferred that fossils were once part of living animals.
Explanation:
He realized that seashells that were from rocks were identical to ones on a beach.
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