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
mariarad [96]
3 years ago
9

how many moles of a nonvolatile, nonelectrolyte solute are required to lower the freezing point of 1000 grams of water by 5.58

Chemistry
1 answer:
Ivan3 years ago
5 0

Answer:

Explanation:

Using freezing point depression formula,

ΔTemp.f = Kf * b * i

Where,

ΔTemp.f = temp.f(pure solvent) - temp.f(solution)

b = molality

i = van't Hoff factor

Kf = cryoscopic constant

= 1.86°C/m for water

= (0 - (-5.58))/1.86

= 3.00 mol/kg

Assume 1 kg of water(solvent)

= (3.00 x 1)

= 3.00 mol.

You might be interested in
Complete by describing what the change of the state of the matter will be for the process to occur
Brilliant_brown [7]

Answer:

Freezing: Liquid turns into solid. Evaporation: Liquid turns into gas. Condensation: Gas turns into liquid. Sublimation: solid into gas. Deposition: Gas into solid.

Explanation:

4 0
3 years ago
Which elements make up 95 percent (by weight) of the human body?
Alex17521 [72]
Oxygen,carbon,hydrogen,and nitrogen- together make up 95 percent of the mass of the human body.
Hope this helps.
3 0
2 years ago
An atom of uranium-238 undergoes radioactive decay to form an atom of thorium-234. Which type of nuclear decay has occurred?
WINSTONCH [101]

Answer:-

Alpha decay

Explanation:-

Uranium 238 has atomic number 92 and mass number 238.

Thorium 234 has atomic number 90 and mass number 234.

So, the change in atomic number as uranium 238 disintegrates into thorium234 = 92 – 90 = 2

So, the change in mass number as uranium 238 disintegrates into thorium234= 238 – 234 = 4

We know that when an alpha particle is emitted, the mass number decreases by 4 and the atomic number decreases by 2.

So when an atom of uranium 238 undergoes radioactive decay to form an atom of thorium-234, alpha decay has occurred.

5 0
3 years ago
True or False? The fatal 1930 incident in Muese Valley, Belgium, was associated with leakage of toxic chemicals from a former du
Westkost [7]

Answer:

FALSE                            

Explanation:

The incident of Muese Valley occured in 1930 due to air pollution.

Muese Valley lies along the river Muese which is situated Huy and Liege, Belgium. This region was crowded with industries including steel manufacturers, glass manufacturers, explosives plants, zinc smelter, etc.

The increase number of industries and population lead to the sources of pollution. Also increase in burning of domestic coal increased pollution surrounding the area.

Air pollution became so severe at this region that people have severe  respiratory problems. Residents suffered from vomiting, retrosternal pain, coughing fits and several experienced nausea. There were fog and smog all over and many people died.

Hence the answer is FALSE.

8 0
3 years ago
What do the coefficients in the following balanced chemical equation mean?
mafiozo [28]
It's either B or D because there would be 2 coefficients of hydrogen and one of oxygen
6 0
3 years ago
Other questions:
  • I’LL MAKE YOU BRAINLIEST+ FREE POINTS
    12·1 answer
  • If you had 24 moles of hydrogen gas how many moles of ammonia (NH3) would be produced?
    10·1 answer
  • Mars is 1.52 au from the sun . about how many kilometers is mars from the sun
    9·1 answer
  • What is the smallest chemical element?
    11·1 answer
  • When table salt (NaCl) is added to water, it lowers the freezing point is more salt is added, the freezing point decreases even
    12·1 answer
  • How to determine the group of an element based on an electron configuration
    5·1 answer
  • HELP PLEASE!!!!!
    14·2 answers
  • How many molecules are 0.5000 miles of H2?
    14·1 answer
  • Two voltaic cells are to be joined so that one will run the other as an electrolytic cell. In the first cell, one half-cell has
    10·1 answer
  • The average kinetic of a gas remains the same when A. It’s volume is decreased B. It’s tell us decreasedC. It’s tell is increase
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!