Calculate the mass of 1.35 moles of sodium chloride

78.894g of NaCl

Explanation:

This requires some dimensional analysis:

Using the molar mass of NaCl we get the answer we are looking for.

1.35 Moles of NaOH * = 78.894 g of NaCl

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.