Review this equation: hcl + naoh nacl + h2o. what volume of a 6.0 m hcl solution is required to completely neutralize 125.0 ml of a 2.5 m naoh solution? 125 ml 2.5 ml 52 ml 6.0 ml 104 ml

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.