Question

1. in the investigation, a white precipitate (caso₄) formed after the two solutions were mixed in the sealed flask.

cacl₂ solution
na₂so₄ solution
caso₄ white precipitate in nacl solution
300.23 g
300.23 g
which evidence about the investigation using the chemicals in the flask best explains the results?
the products contain more molecules than the reactants, which explains the result
the solid that formed must weigh less than the liquids that were mixed, which explains the result
some of the atoms in the reactants disappeared when the solid formed, so fewer atoms are in the products
the atoms from the reactants are still present in the products, just rearranged into new substances.

Explanation:

According to the law of conservation of mass, in a chemical reaction, atoms are neither created nor destroyed, just rearranged. The mass before and after the reaction in the sealed - flask is the same (300.23 g). This indicates that the atoms from the reactants are still present in the products, just rearranged into new substances.

Answer:

The atoms from the reactants are still present in the products, just rearranged into new substances.