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
Ksenya-84 [330]
3 years ago
6

In a mixture of volatile substances, the vapor pressure of the solution depends on the vapor pressure of both substances (solute

and solvent). Each component can evaporate, but its vapor pressure is lowered by the presence of the other substance following Rault's law. The vapor pressure of the solvent is calculated using Psolvent = Xsolvent*Posolvent and the vapor pressure of the solute is calculated using Psolute = Xsolute*Posolute. The total vapor pressure can be calculated by Dalton's law of partial pressures, Ptotal = Psolvent + Psolute.At 25oC, the vapor pressure of pure benzene (C6H6, 78.11 g/mol) is 96 torr. At the same temperature, the vapor pressure of pure toluene (C7H8, 92.14 g/mol) is 14 torr. Consider a solution containing 2.15 mol of benzene and 8.53 mol of toluene. Calculate the vapor pressure above the solution. Enter your answer in units of torr to three significant figures.
Chemistry
1 answer:
Alborosie3 years ago
5 0

Answer:

30.4 torr

Explanation:

We have all the information which is required to solve this question ( more than we even need as the molecular weight)

Ptotal = Ptoluene + Pbenzene

Ptotal = Xtoluene Pºtoluene + XbenzenePºbenzene

The mole fraction is given by the formula:

X =number of moles / total number of moles

Xtoluene = 8.53 / (2.15+8.53) = 0.80

Xbenzene = 2.15 / 10.68 = 0.20

⇒Ptotal = 0.80 x 14torr + 0.20 x 96 torr = 30.4 torr

You might be interested in
Molecule A is a __________. Bonding of fatty acids and polar phosphate groups to glycerol. Molecule A is a __________. Bonding o
Elena L [17]

Answer:

The correct option is: c. phospholipid      

Explanation:

Phospholipids, also known as glycerophospholipids, are the derivatives of fatty acids which is a major structural component of the cell membranes.

Phospholipid is the class of lipids that is composed of a <u>glycerol molecule that forms ester bonds with the two long-chain fatty acids and one phosphate group.</u>

<u>Therefore, Molecule A is a </u><u>phospholipid.</u>

7 0
3 years ago
How many σ and π bonds are present in a molecule of cumulene?
dimaraw [331]

A hydrocarbon with three or more consecutive (cumulative) double bonds is known as a cumulene. They are analogous to allenes, only exhibiting a more elongated chain. The basic molecule in this category is butatriene, which is also simply known as cumulene.  

In the structure of a cumulene, there are 3 double bonds and 4 single bonds. The double bond comprises 1 sigma bond, and 1 pi bond and 4 hydrogen bond produces a sigma bond with carbon. Thus, the molecule of cumulene comprises 7 sigma bonds and 3 pi bonds.  


3 0
3 years ago
Read 2 more answers
An atom has 20 protons, 26 neutrons, and 20 electrons. what could be the atomic mass of this atom?
Elanso [62]
46 is the answer. because if you add 26 and 20 that is the mass
7 0
3 years ago
Name three stars that are hotter than the sun
devlian [24]

Eta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 36,000-40,000 Kelvin. Just for comparison, 40,000 Kelvin is about 72,000 degrees F. So it's the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.

7 0
3 years ago
Define an ideal gas and explain under which conditions you may reasonably approximate a real gas as an ideal gas. Also mention c
TEA [102]

Answer:

High temperature and low pressure

Explanation:

According to the kinetic molecular theory, gases are composed of small particles called molecules which are in constant motion.

At high temperature and low pressure, gas molecules possess high kinetic energy and move at high velocities hence intermolecular interaction is almost none existent and real gases approach the behavior of ideal gases.

5 0
2 years ago
Other questions:
  • Why is the nacl extracted with water three times as opposed to only once?
    9·1 answer
  • 100 points! Formation of an Ion
    5·2 answers
  • Where are most organisms that live in the ocean found ? why ?
    5·1 answer
  • How many moles of HBr are present in 250 ml of a 0.15 M HBr solution?
    11·1 answer
  • A 24.0 gram object has a volume of 6.0 mL. What is the density of the object?
    15·2 answers
  • Theobromine, C7H8N4O2, is a component of chocolate. It is mildly diuretic, is a mild stimulant, and relaxes the smooth muscles o
    15·1 answer
  • What is transpiration?
    10·1 answer
  • NEED HELP FAST!20 pts for an easy worksheet
    10·1 answer
  • Which of the answer choices correctly describes Le Châtlier's principle?
    5·2 answers
  • Hdhdhzjzjzj which??????????????????
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!