Question

V GOSTEGU When 32.3 g of alanine (C,H,NO,) are dissolved in 700.g of a certain mystery liquid X, the freezing point of the solution is 2.90 "Cless than the freezing point of pure X Calculate the mass of Iron(III) chloride that must be dissolved in the same mass of X to produce the same depression in freezing point. The van't Hoff factor i-3.68 for iron(III) chloride in X. Be sure your answer has a unit symbol, if necessary, and round your answer to 3 significant digits.

Answer 1

well the answer is correct but I want you take care of number of proper significant digit in answer .

Change in - Krotx x Mass of alanina freezing point - Molar mars of alanine 2.90°c = K+ x 32.3 g 1000 1000 mass of X ". 89.099/mol 700 g Ke 2,90 89.09 x 700 = 180895} ] 55.599 Cim 323 x 10W 32300 Changi -k freezing point t or x x o x Mass of iron Fea, (x) chloride (11) Mas of X Molar mass of Feu 2,90 a 5,599 X3.68 *x Jood 162-2 Too : 2.90 X 162.2 x 700 329266 . 5.599 x 3.68 x low 20604.32 - 15.98 gram Answer can be -15.9g luonnorom