Select the correct answer. which of the following is true for balancing equations? a. the number of products should be equal to the number of reactants. ob. the properties of products should be the same as the properties of reactants. c. there must be as equal number of compounds on both sides of the equation. d. there must be as equal number of atoms of each element on both sides of the equation.

I believe the answer is A

the law of conservation of mass states that in a chemical reaction, the total mass of reactants is equal to the total mass of products. because atoms are only rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both the reactants and products

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.