Well a compound is 2 or more different molecules together. So if you see a periodic table you will see the elements to see if they are the same or not.
The endothermic reaction would be D. Batter becomes a pancake when heated. This is because the batter is absorbing the heat in order to turn into a pancake.
Answer is D. Batter becomes a pancake when heated.
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No chemical because, its changeing the stuff
Answer:
I think it's answer is P4O6
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