How is matter and energy conserved in this chemical reaction?

The ratio of reactants and products in a chemical reaction is called chemical stoichiometry . Stoichiometry depends on the fact that matter is conserved in chemical processes, and calculations giving mass relationships are based on the concept of the mole . One mole of any element or compound contains the same number of atoms or molecules, respectively, as one mole of any other element or compound.

Explanation:

Hope this helps :)

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;