What can be inferred from the results of scheme a about the relative thermodynamic stabilities of compounds 4a and 4b?

a. they are equally stable.
b. compound 4a is less stable than compound 4b.
c. compound 4a is more stable than compound 4b.
d. nothing can be inferred about relative thermodynamic stabilities.

if you're asking what comes out, it's steam.

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.