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Q.

 If all the reactants in a chemical reaction are completely used, which of the following statements accurately describes the relationship between the reactants and the products?
 

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a

The density of the reactants must equal the density of the products.

b

The reactants must contain more complex molecules than the products do.

c

The total mass of the reactants must equal the total mass of the products.

d

The products must have a different physical state than the reactants.

answer is C.

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Detailed Solution

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As per the Law of Conservation of Mass, in a chemical reaction, the mass of the reactants and the mass of the products remain the same.

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