Question

An aqueous solution of Borax (Na2B4O7) is sometimes used to fireproof wood. 

What is the molarity of 2.50 L of solution that contains 1.85 mol of Na2B4O7?  

Answer 1

C_M = n / V

C_M (Na₂B₄O₇) = 1.85 / 2.50 = 0.74 M