Question

question 4
antoine lavoisier found that mass was conserved in chemical reactions when he saw that
heat was released in chemical reactions.
the mass of the products were heavier than the mass of the reactants.
the products differed greatly from the reactants.
the mass of the products was the same as that of the reactants.

Explanation:

Antoine Lavoisier's law of conservation of mass states that in a chemical reaction, the mass of the reactants is equal to the mass of the products. The other options do not relate to mass conservation. Heat release (first option) is about energy, not mass. If products were heavier (second option), mass wouldn't be conserved. Products differing from reactants (third option) is about chemical identity, not mass.

Answer:

the mass of the products was the same as that of the reactants.