Calculate the mass of p-dichlorobenzene (mm=147.00 g/mol) that when dissolved in 125 ml cyclohexane (d=0.779 g/mol,...
Calculate the mass of p-dichlorobenzene (mm=147.00 g/mol) that when dissolved in 125 ml cyclohexane (d=0.779 g/mol, mm=84.16 g/mol) creates a solution with a boiling point of 81 degrees celcius. the kf of cyclohexane is 2.75 c/mol.
Homework Answers
Add Answer to:
Calculate the mass of p-dichlorobenzene (mm=147.00 g/mol) that
when dissolved in 125 ml cyclohexane (d=0.779 g/mol,...
An unknown sample weighs 0.2436 g was dissolved in 20.0 mL of cyclohexane (density = 0.779...
An unknown sample weighs 0.2436 g was dissolved in 20.0 mL of cyclohexane (density = 0.779 g/mL). The freezing point depression (∆Tf) was 2.5°C. Calculate the molar mass of the unknown substance. (Kf = 20.5 °C/m) ∆Tf = Kf m where Kf is the freezing point depression constant and m is molality. 526 g/mol 1.50 g/mol 128 g/mol 2.44 g/mol
When 3.24 g of p-dichlorobenzene was dissolved in 25.40 g of benzene, the solution froze at...
When 3.24 g of p-dichlorobenzene was dissolved in 25.40 g of benzene, the solution froze at –1.9˚C. The freezing point of pure benzene is 5.4 ˚C. Calculate the Kf of benzene.
0.230 g of a compound is dissolved in 10 g of cyclohexane. the solution freezes at...
0.230 g of a compound is dissolved in 10 g of cyclohexane. the solution freezes at 5.12 degrees celcius. calculate the molecular weight of the compound. the freezing point of pure benzene is 5.455 degrees Celsius and the kf = 5.065 degrees Celsius/ m
p-dichlorobenzene is an organic molecular (covalent) compound with i = 1 and Kf = 7.10 oC/m...
p-dichlorobenzene is an organic molecular (covalent) compound with i = 1 and Kf = 7.10 oC/m A student weighed 11.20 mL of p-dichlorobenzene and recorded mass of it as 10.820 g. The freezing point of the pure p-dichlorobenzene liquid was determined as 53.1 oC. 1.118 g of an unknown solid compound was added and completely dissolved in the previous sample of pure p-dichlorobenzene liquid. The freezing point determination procedure was conducted for the solution and the freezing point of this...
3a. Calculate the molar mass (in g/mol) of an unknown 1:1 electrolyte if 0.482 g dissolved...
3a. Calculate the molar mass (in g/mol) of an unknown 1:1 electrolyte if 0.482 g dissolved in 223.1 mL of water at 74.75 °C has an osmotic pressure of 54.4 mmHg. R = 0.082058 L⋅atm⋅mol−1⋅K−1. 1.00 atm = 760 mmHg. Report your answer to THREE significant figures. 3b. Calculate the required mass of an unknown nonelectrolyte (ℳ = 131.5599 g/mol) dissolved in 140.1 g of solvent that gives a solution that boils at 36.04 °C. The boiling point of the...
5. When 4.50 g of a substance are dissolved in 125 g of CCl, (M-153.8 g/mol),...
5. When 4.50 g of a substance are dissolved in 125 g of CCl, (M-153.8 g/mol), the freezing point of the solution is depressed by 3.9 K. KCCl) 30 and K,(CC4) 4.95 K kg mol 0.64 K] a) What is the boiling point elevation of the solution? b) By what fraction is the vapor pressure of the solvent reduced? 1
Data were collected to determine the molar mass of a nonvolatile solid solute dissolved in cyclohexane....
Data were collected to determine the molar mass of a nonvolatile solid solute dissolved in cyclohexane. Complete the table for the analysis. Record calculated values with the correct number of significant figures. Show detailed calculations to the right of the table. Volume of cyclohexane (mL): 15.5 Mass of cyclohexane (kg): _________ Mass of added solute (g): 0.1660 Kf for cyclohexane (˚C/m): 20.0 Freezing point change, ΔTf (˚C): 2.20 Moles of solute (mol): _________ Molar mass of solute (g/mol):__________
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0....
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0. 0.147 g of an unknown solute is dissolved in 7.71 g of cyclohexane (C6H12). The freezing point of the solution was 3.38°C. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.139 g of the unknown is dissolved. The freezing point of the resulting solution was 0.85°C. Calculate the corresponding molar mass...
1.A solution that contains 15.581 grams of benzene (molar mass = 78.1 g/mol) in 420 g...
1.A solution that contains 15.581 grams of benzene (molar mass = 78.1 g/mol) in 420 g of cyclohexane freezes at a temperature 9.50 ºC below the freezing point of pure cyclohexane. Calculate the molar freezing point depression constant, Kf, for cyclohexane. 2. The molar boiling point elevation constant for water is 0.512 ºC/m. What is the boiling point of a solution containing 673 g of water and 78.0 g of CaCl2? 3. A solution containing 32.0 g of an unknown...
1.When a solution is made from 32.2 g of an unknown nonelectrolyte dissolved in 151 g...
1.When a solution is made from 32.2 g of an unknown nonelectrolyte dissolved in 151 g of solvent, the solution boils at 83.44 °C. The boiling point of the pure solvent and its Kb are 79.31 °C and 4.47 °C/m, respectively. Calculate the molar mass of the unknown electrolyte in g/mol. 2. Calculate the molar mass (in g/mol) of an unknown nonelectrolyte if 0.898 g dissolved in 268.7 mL of water at 30.13 °C has an osmotic pressure of 68.1...
5. When 4.50 g of a substance are dissolved in 125 g of CCl, (M-153.8 g/mol), the freezing point of the solution is depressed by 3.9 K. KCCl) 30 and K,(CC4) 4.95 K kg mol 0.64 K] a) What is the boiling point elevation of the solution? b) By what fraction is the vapor pressure of the solvent reduced? 1
Molar Mass of a Solute The freezing point of cyclohexane is 6.50°C. For cyclohexane solvent Kf=20.0. 0.147 g of an unknown solute is dissolved in 7.71 g of cyclohexane (C6H12). The freezing point of the solution was 3.38°C. Calculate the corresponding molar mass of the solute. g/mol 1homework pts Submit Answer Tries 0/5 To the above solution a further 0.139 g of the unknown is dissolved. The freezing point of the resulting solution was 0.85°C. Calculate the corresponding molar mass...
Most questions answered within 3 hours.
-
Problem: Patient Fees C++
You are to write a program that computes a patient’s bill for...
asked 56 minutes ago -
In a population of interest, we know that, 77% drink coffee, and
23% drink tea. Assume...
asked 1 hour ago -
Given that f(x) = e-(x-1) for x > 1, determine the following
probabilities:
a) P(X <...
asked 1 hour ago -
A mechanic pushes a 2.60 ✕ 103-kg car from rest to a speed of v,
doing...
asked 1 hour ago -
International information systems result in all of the following
except:
A. improved quality of information flow....
asked 1 hour ago -
The president of the retailer Prime Products has just approached
the company’s bank with a request...
asked 1 hour ago -
If the carrying amount is $200,000 and recoverable amount is
$205000, the impairment amount is:
Select...
asked 1 hour ago -
The correlation is inappropriate as a measure of association
between two quantitative variables (you may select...
asked 1 hour ago -
USE THE DATA IN THE TABLE BELOW TO ANSWER QUESTIONS 19 – 24
(Assume all account...
asked 1 hour ago -
Mahaley, Inc., manufactures and sells two products: Product Q9
and Product F0. Data concerning the expected...
asked 1 hour ago -
To measure the current through one branch of a parallel circuit,
the meter is connected ________....
asked 1 hour ago -
a)
The following table shows the profile, by the math section of
the SAT Reasoning Test,...
asked 1 hour ago