What does the law of conservation of mass state?

mass cannot be created nor destroyed in a chemical reaction

mass can be created but not destroyed in a chemical reaction.

mass can be destroyed but not created during a chemical reaction.

mass can be created and destroyed during a chemical reaction.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

How can parts of a solution be separated by chromatography?

Scientist think that animals with remarkably similar embryo development probably shared a common ancestor