Question

The law of conservation of mass states_____

a) matter can be created and destroyed but does not change forms

b) the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change

c) in a chemical reaction, efforts should be made to preserve rare elements without changing them.

d) in a chemical reaction, the final mass of the products is always greater than the starting mass of the reactants.

Answer 1

i think your answer would be B.

explanation: pretty sure this is correct if not i am so sorry and good luck! <3

Answer 2

B

Step-by-step explanation:

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction