Question

1. choose the best answer. which of these describes the law of conservation of mass? mass cannot be created or destroyed as a result of a chemical reaction. mass can be created or destroyed as a result of a chemical reaction. mass can be destroyed when energy is added to a chemical reaction. a catalyst can increase the mass of products in a chemical reaction. 2) choose the best answer. a chemistry unit used to define the amount of a substance and that is equal to 6.022 x 10^23 particles is a(n)—— avogadro precipitate redox mole

Explanation:

1. The law of conservation of mass states that in a closed system, the total mass of reactants equals the total mass of products in a chemical reaction, meaning mass cannot be created or destroyed during the process.
2. The mole is the SI unit for the amount of a substance, defined as containing exactly $6.02 \times 10^{23}$ elementary particles (atoms, molecules, ions, etc.).

Answer:

1. Mass cannot be created or destroyed as a result of a chemical reaction.
2. mole