Question

how can you prove that water is a compound ​

Answer 1

heeyy mate here is ur answerr
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Water as a Compound and Molecule. Acompound forms whenever two or more atoms form chemical bonds with each other. The chemical formula forwater is H2O, which means each molecule of water consists of one oxygen atom chemically bonded to two hydrogen atoms. Thus, water is a compound.
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Answer 2

the chemical formula of water is H2O

the combination of 2 hydrogen atoms and 1 oxygen atom is called compound.