A 40.0L tank has a pressure of 3.32 atm at a temperature of 56.75C. If there are 165.7 grams of the gas inside the tank , what is the gas's molar 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.