Which of the following is a method of purifying water?
a. adding iodine
b. aeration
c. freezing
d. fixation

The answer to your question is 164 g

Explanation:

Data

molar mass of Na₃PO₄ = ?

Molar mass is also known as molecular weight, it is the result of the sum of the total mass in grams of all the atoms that make up a mole of a particular molecule.

For Sodium phosphate the molar mass if

Na₃PO₄ = (23 x 3) + (31 x 1) + (16 x 4)

             = 69 + 31 + 64

             = 164 g