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In a chemical reaction, the total mass of the reactants is 10.0 grams. after the reaction, the total mass of the products must be:

Aless than 10.0 grams.
Bexactly 10.0 grams.
Cexactly 20.0 grams.
Dmore than 10.0 grams.

Verified Answer :

PhantomRealm

it must be exactly 10.0 grams..... law of conservation of mass

ysabayomi

Answer:

The answer is B

Explanation:

The answer is exactly 10 grams because of the law of conservation of mass which states that for a closed system, the mass of the system must remain constant over time, hence the mass of the products formed after the reaction cannot increase nor decrease as this will violate the law stated earlier.

The above explanation proves the reason for option B. The remaining options suggest either an increase or a decrease in the mass of the product formed which is not possible.

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