What is the % oxygen in C2H5OH

A. 34.7
B. 25.2
C14.6
D50

the answer is a. co2, this would be colder than the : )

explanation:

i think that the answer is c

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.