Classify each of these soluble solutes as a strong electrolyte, a weak electrolyte, or a nonelectrolyte. Solutes Formula
Sulfuric acid H2SO4
Sodium hydroxide NaOH
Carbonic acid H2CO3
Ethyl amine CH3CH2NH2
Potassium chloride KCl
Methanol CH3OH
Sucrose C12H22O11

Strong Electrolyte: Strong acids, strong bases and salts fall under this category. These compounds ionize completely.

Sulfuric acid H2SO4

Sodium hydroxide NaOH

Potassium chloride KCl

Weak Electrolyte: Weak acid and weak bases are weak electrolytes. These compounds do not ionize completely.

Carbonic acid H2CO3

Ethyl amine CH3CH2NH2

Non Electrolyte: This refers to compounds that are not capable of forming ions or dissociate into ions in a solution.

Sucrose C12H22O11

Methanol CH3OH

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)