Chemistry
08.01.2021 22:39
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Which of the following is a sign a chemical reaction has occurred?
Which of the following is a sign a chemical reaction has occurred?
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tremainecrump1466
4,8(92 marks)
The answer is not B because a new substance is not created, they just produced sparks and gas. The answer is not C because the liquid is still THE liquid even if it starts to boil. The answer is not D because that is a physical change called dissolving. So the answer would have to be A; blue liquid is mixed into a yellow liquid, and the mixture turns green. The two substances are being mixed together and created a new substance. Also a sign of chemical reaction is color change.
shetherealbrat
4,4(70 marks)
Option 4 or the dissolution of the oxygen decreases
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