What happens during every chemical change? A. Heat or light is produced.
B. Two substances combine to make a different substance.
C. One type of matter becomes another type of matter.
D. Matter changes from one state to another.
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What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

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.