A solution with a total volume of 2.5 liters is composed of 31.4 grams of Na2S in water. What is the: molarity of this solution

             0.1608 mol/L

Explanation:

Calculate moles as,

Mole = Mass/M.Mass

Mole = 31.4 g / 78.045 g/mol

Mole = 0.402 mol

Now,

Molarity = Moles / Vol. in L

Molarity = 0.402 mol / 2.5 L

Molarity = 0.1608 mol/L

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;