Given an aqueous acetaminophen standard to prepare 2.0 x 10^-5 M, 4.0 x 10^-5 M, 10.0 x 10^-5 M, and 20.0 x 10^-5 M solutions of acetaminophen in 50 mL flasks, determine the volume of standards required to put into each 50 mL flask.

the answer is 0.8m.

by: nicholas

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.