Areaction between liquid reactants takes place at in a sealed, evacuated vessel with a measured volume of . measurements show that the reaction produced of chlorine pentafluoride gas. calculate the pressure of chlorine pentafluoride gas in the reaction vessel after the reaction. you may ignore the volume of the liquid reactants. be sure your answer has the correct number of significant digits.

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.  

gas and precipitate r the correct answers