Calculate the molality NH3 (17 g/mol) in a 5.05% (w/w) aqueous solution. (dsoln = 0.9651 g/mL)...

Question

Question

Calculate the molality NH3 (17 g/mol) in a 5.05% (w/w) aqueous solution. (dsoln = 0.9651 g/mL) three sig figs

science chemistry

Answer 1

Answer #1

5.05 w/w % means

5.05 g NH3 present in 100 g solution

mass of solute = 5.05

mass of solvent = 100 - 5.05 = 94.95 g

molality = (W /MW) (1000 / mass of solvent in g)

molality = (5.05 / 17) (1000 / 94.95)

molality = 3.13 m

Add a comment

Answer 2

Similar Homework Help Questions

Calculate the molality, the molarity, and the mole fraction of NH3 in an 7.70 mass %...

Calculate the molality, the molarity, and the mole fraction of NH3 in an 7.70 mass % aqueous solution (d = 0.9651 g/mL).
Be sure to answer all parts. Calculate the molality, the molarity, and the mole fraction of...

Be sure to answer all parts. Calculate the molality, the molarity, and the mole fraction of NH3 in an 17.80 mass % aqueous solution (d = 0.9651 g/mL). m? M? mole fraction?
Calculate the molarity and molality of an NHz solution made up of 30.0 g of NH3...

Calculate the molarity and molality of an NHz solution made up of 30.0 g of NH3 in 80.0 g of water. The density of the solution is 0.952 g/mL. Molarity = M Molality =

3. The density of a 4.53 M NH, solution is 0.9651 g/mL Calculate the molality 4....

3. The density of a 4.53 M NH, solution is 0.9651 g/mL Calculate the molality 4. Calculate the freezing and boiling points of a solution made by mixing 10.5 g magnesium iodide with 150.0 g water. 5. A solution prepared by dissolving 0.56 g of a non-ionic solute in 25.0 g benzene freezes at 4.45°C. What is the molar mass of the solute?
Calculate the molality, the molarity, and the mole fraction of NH_3 in an 13.50 mass %...

Calculate the molality, the molarity, and the mole fraction of NH_3 in an 13.50 mass % aqueous solution (d = 0.9651 g/mL). m M mole fraction
calculate molarity, molality and mole fraction of ammonia (NH3) in a 20%w solution of ammonia at...

calculate molarity, molality and mole fraction of ammonia (NH3) in a 20%w solution of ammonia at 20c, density= 0.923g/ml in 1 liter solution

An aqueous solution is 0.500% by mass ammonia, NH3, and has a density of 0.996 g/mL. ...

An aqueous solution is 0.500% by mass ammonia, NH3, and has a density of 0.996 g/mL. The molality of ammonia in the solution is m.
What is the molality of NaCl (58.5 g/mol) in an aqueous solution which is 4.2 molar?...

What is the molality of NaCl (58.5 g/mol) in an aqueous solution which is 4.2 molar? The density of the solution is 1.05 g/mL. ANSWER: 5.22 m Please, show the steps using dimensional analysis if possible. Thank you
calculates the density (g / ml) and the molality of an aqueous solution of HF at...

calculates the density (g / ml) and the molality of an aqueous solution of HF at 48.0% by mass whose concentration is 27.60M

3a. What is the molality of a solution prepared by dissolving 22.78 g of copper (I)...

3a. What is the molality of a solution prepared by dissolving 22.78 g of copper (I) sulfate in 435.2 g of water? Report your answer to THREE significant figures. 3b. Calculate the mole fraction of compound C (ℳ = 132.0890 g/mol) in a solution prepared from 291 g of compound C and 101 g of compound B (ℳ = 272.2190 g/mol). Report your answer to THREE significant figures. 3c. Calculate the percent mass of sodium hypochlorite in a solution prepared...