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
coldgirl [10]
3 years ago
6

What is the molality of a solution prepared by dissolving 75.8 g of ethylene glycol, HOCH2CH2OH, in 1.55 L of water? Assume the

density of water is 1.00 g/mL.
Chemistry
1 answer:
GaryK [48]3 years ago
7 0

Answer:

                     0.787 mol.Kg⁻¹   or    0.787 m

Explanation:

Data Given:

                  Mass =  m  =  75.8 g

                  Volume  =  V  =  1.55 L = 1550 mL

                  M.Mass of Ethylene Glycol  =  62.07 g/mol

                  Density of water  =  d = 1.0 g/mL

To Find:

                   Molality  =  <u>??</u>

Molality is a unit of concentration and is defined as the number of moles of solute per Kg of a solvent.

                    Molality  =  Moles of Solute / Kg of Solvent  --- (1)

First Calculate Moles of Solute as;

                    Moles  =  Mass / M.Mass

                    Moles  =  75.8 g / 62.07 g/mol

                    Moles  = 1.22 moles

Secondly calculate mass of water as,

                    mass of water  =  density × volume

                    mass of water  =  1.0 g/mL × 1550 mL

                    mass of water  =  1550 g or 1.55 Kg

Now, putting values of moles and mass of solvent in equation 1,

                    Molality  =  1.22 mol / 1.55 Kg

                    Molality  =  0.787 mol.Kg⁻¹   or    0.787 m

You might be interested in
2. What does the text list and describe?
Mariana [72]

Answer:

C. ways radiation is transferred into and through Earth's atmosphere

Explanation:

6 0
3 years ago
When forming a chemical bond only the<br> blank electrons participate in the bonding process
serious [3.7K]

A chemical bond is created by either the transfer or sharing of electrons. Electrons with a missing full outer shell will be the ones participating in the bonding process. Hope this helped :)

3 0
3 years ago
Do periods run left to right on the periodic table
Sergio039 [100]

Answer:

correct

have a good day :)

Explanation:

7 0
3 years ago
What is the answer to [h+]=0.235M
IrinaVladis [17]
What are you trying to work out???
3 0
3 years ago
Why is lithium used in the body?
Veronika [31]

Answer:

Lithium is used to treat mania that is part of bipolar disorder (manic-depressive illness). It is also used on a daily basis to reduce the frequency and severity of manic episodes.

8 0
3 years ago
Other questions:
  • When a solution is considered to have a high concentration of hydrogen ions (H+) is also considered to be?
    8·1 answer
  • Which of the following is not an example of a polymer?
    15·2 answers
  • Please Help will give 10 pts and brainliest for help! I have quite a few so be careful what you put.
    9·1 answer
  • Consider the following standard heats of formation:
    8·1 answer
  • Rank the following solutes in order of increasing entropy when 0.0100 moles of each dissolve in 1.00 liter of water.
    11·1 answer
  • Which statement is true about compounds? They do not form living things. They do not form nonliving things. They are formed when
    15·1 answer
  • What is the total of the amount of energy that is reflected back into space​
    5·1 answer
  • During an experiment, Jasmine observes light being produced from mixing 2 substances in a beaker. What does this evidence sugges
    8·1 answer
  • What is the correct electron configuration for an element with 5 electrons in
    12·1 answer
  • copper hydroxide and potassium sulfate are produced when potassium hydroxide reacts with copper sulfate balanced equation
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!