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C. they both eat and grow a lot, i hope it helps
Answer:
Compound: two or more different atoms chemically bonded together. Molecule: two or more different or same atoms chemically bonded together. Element: one single atom. A mixture contains two or more substances (elements, lattices, molecules, compounds), that are not chemically bonded together.
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Answer:
I might be totally wrong but O means oxygen and H hydrogen
Explanation:
I don't know if its different when they are together.
Answer:
A) Copper has a lower activity than hydrogen and cannot replace it.
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