How many of the following are true concerning balanced chemical equations?

I. The number of molecules is conserved.

II. The coefficients for the reactants tell you how much of each reactant you are given.

III. Atoms are neither created nor destroyed.

IV. The coefficients indicate the mass ratios of the substances used.

V. The sum of the coefficients on the reactant side equals the sum of the coefficients on the product side.

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