12) Commercial grade HCI solutions are typically 390% (by mass) HCl in water. De
ID: 695756 • Letter: 1
Question
12) Commercial grade HCI solutions are typically 390% (by mass) HCl in water. Determine the molarity of the HCL, if the solution has a density of 1.20g/m A)935 M B)7.9M139 M D) 107 M E128M 13) A 1500 mt sample of an aqueous solution at 25 C contains 15.2 mg of an unknown nonelectrolyte compound. If the solution has an osmotic pressure of 844 torr, what is the molar mass of the unknown compound A) 341 g/mol B) 223 g 195 g/mol D)294 g/mo E)448 g/mol 14) Consider the following reaction: A reaction mixture initially contains 1.6 M Cociz. Determine the equilibrium concentration of CO if Ke 104, Calculate this based on the assumption that the answer for the reaction at this temperature is 8.33 is negligible compared to 1.6 A)2.1 10-2M B) 42 x 10-AM C)13 x 10-3M D)1.5-10-3 M E)37 102M 15) Define Le Chatrlier's Principk A) When a chemical system at equilibrium is disturbed, the system shifts in a direction that equals the B) A system will always change if the volume changes. C) A system will always change if the pressure changes D) When a chemical system at equilibrium is disturbed, the system shifts in a direction that maximizes the disturbance, E) When a chemical system at equilibrium is disturbed, the system shifts in a direction that minimizes theExplanation / Answer
12) Molarity = (% mass x 10 x d / MW)
% mass = 39.0
d = 1.20 g /mL
MW = 36.5 g /mol
Molarity = (39.0 x 10 x 1.20 / 36.5)
Molarity = 12.8 M
answer = option E = 12.8 M
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.