Chemistry, 11.11.2019 18:31 allieballey0727
Which of the following is not true about chemical changes? a. they form a new substance. b. they can be reversed by physical changes. c. they can be detected by changes such as color. d. they have different properties from their starting materials.
Answers: 3
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What is the independent variable in this investigation? mass volume sample number substance density
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Stage in which a star’s outer layers have started to cool and grow outward?
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16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.
Answers: 2
Which of the following is not true about chemical changes? a. they form a new substance. b. they ca...
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