answer.
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
r-ruslan [8.4K]
2 years ago
10

The vapor pressure of pure water at 85oC is 434 torr. What is the vapor pressure at 85oC of a solution prepared from 100 mL of w

ater (density 1.00 g/mL) and 150 g of diglyme, C6H14O3, a nonvolatile substance?
Chemistry
1 answer:
Alexandra [31]2 years ago
7 0

Answer:

P=361.2torr

Explanation:

Hello,

In this case, considering that the formed liquid is solution is ideal, we can relate the vapor pressure and molar fraction of water with the total vapor pressure of the solution by using the Dalton's equilibrium-based law:

P=x_{H_2O}P_{H_2O}^v

In such a way, we compute the molar fraction of water by computing its moles as well as diglyme:

n_{H_2O}=100mL*\frac{1g}{1mL} *\frac{1mol}{18g} =5.56molH_2O\\\\n_{C_6H_{14}O_3}=150g*\frac{1mol}{134g}=1.12molC_6H_{14}O_3

Thus, the mole fraction of water:

x_{H_2O}=\frac{5.56mol}{5.56mol+1.12mol}=0.832

Thereby, the vapor pressure of the solution:

P=0.832*434torr\\\\P=361.2torr

Regards.

You might be interested in
What is the molarity and molality of a solution that is 10.00 % by mass potassium hydrogen carbonate (KHCO3, 100.11 g/mol) and h
maksim [4K]

Answer: The molarity and molality of a solution is 1.06 M and 1.11 m respectively.

Explanation:

Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

Molality=\frac{n\times 1000}{W_s}

where,

n = moles of solute  =

W_s = weight of solvent in g

10.00 g of potassium hydrogen carbonate in 100 g of solution

mass of solvent = mass of solution - mass of solute = (100.0-10.00) = 90.0 g

Molality=\frac{0.09985\times 1000}{90.0}=1.11m

2. Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute  = 0.09985

V_s = volume of solution in ml

Density of solution = 1036.5 g/L

Volume of solution =\frac{\text {mass of solution}}{\text {Density of solution}}=\frac{100.0g}{1.0650g/ml}=93.90ml

Molality= \frac{0.09985\times 1000}{93.90ml}=1.06M

4 0
2 years ago
Show that the Newton has the units of mass times acceleration
Dimas [21]

F = ma = (kg)(m/s2) = kg ´ m/s2 N

hope this helps :D

7 0
2 years ago
What are the intermolecular forces between molecules in a liquid sample of sulfur trioxide,SO3?a. hydrogen bonding b. dipole-dip
fgiga [73]

Answer:

dispersion forces

Explanation:

SO3 is a trigonal planar molecule. All the dipoles of the S-O bonds cancel out making the molecule to be a nonpolar molecule.

The primary intermolecular force in nonpolar molecules is the London dispersion forces. As expected, the London dispersion forces is the intermolecular force present in SO3.

Hence SO3 is a symmetrical molecule having only weak dispersion forces acting between its molecules.

8 0
2 years ago
Which statement accurately compares ionic and covalent bonding?
Travka [436]

Answer:

Conduct electricity when they are molten, while covalent compounds usually do not conduct electricity when they are molten.

5 0
2 years ago
Read 2 more answers
A car moves at a speed of 50 kilometers/hour. Its kinetic energy is 400 joules. If the same car moves at a speed of 100 kilomete
lys-0071 [83]

ke prop to v^2


ke1/v1^2=ke2/v2^2


400/50x50=joules/100x100


400x2x2


1600j

8 0
2 years ago
Other questions:
  • How can you tell if a sample contains baking soda and cornstarch or baking powder?
    6·2 answers
  • Which of the following would most likely contain a fossil?
    11·2 answers
  • What is the chemical formula for ammonium sulfate?
    8·2 answers
  • If 3.45 grams of Mg are burned how many grams of MgO are produced
    15·2 answers
  • How many free ions are there on the products side of the total ionic equations that results from the reaction between bismuth 3
    10·1 answer
  • A chef is serving a lunch special with 1 sandwich and 2 corn cobs per plate. If there are 5 sandwiches and 14 corn cobs, what is
    5·2 answers
  • Which statement is true about molarity and percent by mass?
    12·2 answers
  • HCN forms when synthetic fibers containing Orlon® or Acrilan® burn. Acrilan® has an empirical formula of CH2CHCN, so HCN is 50.9
    8·1 answer
  • Assume the following substances are soluble in water.
    11·1 answer
  • A 110.0-g sample of metal at 82.00°C is added to 110.0 g of H2O(l) at 27.00°C in an insulated container. The temperature rises t
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!