List the controlled, independent and dependent variable of these chemical reactions.
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Chemical Reactions:

-Iron and copper (II) sulfate solution

-Lead (II) nitrate and potassium iodide solutions

-Magnesium metal and hydrochloric acid solution

-Electrolysis of water

-Burning magnesium

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Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.

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