1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
fenix001 [56]
3 years ago
7

Paradichlorobenzene, C6H4Cl2, is a component of mothballs. A solution of 2.00 g in 22.5 g of cyclohexane boils at 82.39 ∘C. The

boiling point of pure cyclohexane is 80.70 ∘C. Calculate Kb for cyclohexane. Express the constant numerically in degrees Celsius per molal.
Chemistry
1 answer:
Rina8888 [55]3 years ago
4 0

Answer:

2.79 °C/m

Explanation:

When a nonvolatile solute is dissolved in a pure solvent, the boiling point of the solvent increases. This property is called ebullioscopy. The temperature change (ΔT) can be calculated by:

ΔT = Kb*W*i

Where Kb is the ebullioscopy constant for the solvent, W is the molality and i is the van't Hoff factor.

W = m1/(M1*m2)

Where m1 is the mass of the solute (in g), M1 is the molar mass of the solute, and m2 is the mass of the solvent (in kg).

The van't Hoff factor represents the dissociation of the elements. For an organic molecule, we can approximate i = 1. Thus:

m1 = 2.00 g

M1 = 147 g/mol

m2 = 0.0225 kg

W = 2/(147*0.0225)

W = 0.6047 mol/kg

(82.39 - 80.70) = Kb*0.6047*1

0.6047Kb = 1.69

Kb = 2.79 °C/m

You might be interested in
The human body has four types of tissues, and the eye contains all four. Which statement correctly pairs the part of the eye
stepladder [879]

Answer:

The correct answer is D) Nerve tissue is found in the retina, the rods and cones at the back of the eye.

Explanation:

The rods and cones are photoreceptors (that is nerve cells within the eyes that can sense light) which is situated in the retina.

These photoreceptors also sense colours and send these signals into the optic nerve for transmission to the brain.

Cheers

6 0
3 years ago
How many electrons do carbon and oxygen share?<br> I-0-I<br> :0:<br> Intro<br> Done
7nadin3 [17]
Girlllll idkkkkknim just tryna get pointtttt
7 0
3 years ago
Read 2 more answers
Help ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
svp [43]

its c with the older down the older it is


4 0
2 years ago
Read 2 more answers
A sample of 10K gold contains the following: 10.0g gold, 4.0g silver, 5.0g copper, and 5.0g nickel. What is the percent gold in
stellarik [79]

Answer:

oook

hi I am so sorry sorry sorry sorry I don't no answer

Explanation:

but you follow me and give me brainliest ok by by by by

6 0
2 years ago
Read 2 more answers
Atoms on the left side of the periodic table tend to form positive ions because
professor190 [17]
They all lose electrons
4 0
2 years ago
Other questions:
  • Determine the oxidation state of nitrogen in lino3.
    5·2 answers
  • What is the total number of pairs of electrons shared between the carbon atom and the oxygen atom in a molecule of methanal?
    8·1 answer
  • A projectile is fired with speed v0 at an angle theta from the horizontal from the horizontal as shown in the figure.
    13·1 answer
  • An object of mass 0.5 kg is swung in uniform circular motion. The radius is 2 meters, and the force exerted is 4 N. Calculate th
    5·1 answer
  • Molarity.
    11·1 answer
  • The percent composition of methyl butanoate is 58.8% C, 9.8% H, and 31.4 % O and its molar mass is 102 g/mol. What is its empiri
    10·1 answer
  • Which property is constant in the combined gas law?
    15·2 answers
  • Ionic equation for Sr3(PO4)2 and its solubility product (Ksp)?​
    13·1 answer
  • From which of the following food group do we get our protein​
    15·1 answer
  • How is oxygen within the hydrosphere?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!