I choose the letter c witch is density I believe that it’s useful for determining identifying relationships between substances
Molar concentration is a measure of the concentration of a solute in a solution, or of any chemical species, in terms of amount of substance per unit volume.
Diethyl ether, since 20 is closer to 34.6 it should start boiling faster than the other which is no where near it
n = Number of Moles
S is the symbol for Sulfur
t is usually temperature
+ and - are the charges of molecules
If they're next to each other, it means it's multiplication, or combined elements (molecules)