1. A container holds four times as many moles of CO2 as O2. If the total pressure in the container is 20. atm,
what is the pressure exerted by carbon dioxide?
T
-
atm
Round your answer to the nearest whole number.

what's the

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.