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
aalyn [17]
3 years ago
7

An aqueous antifreeze solution is 70.0% ethylene glycol (c2h6o2) by mass. the density of the solution is 1.75 g/cm3. calculate t

he molality, molarity, and mole fraction of the ethylene glycol.
Chemistry
1 answer:
AVprozaik [17]3 years ago
6 0

Molarity = moles of solute / kg solvent

 

Assume you have exactly 1 kg of solution. 70% of that, or 700 grams of the solution is C2H6O2, and 300 g of the solution is water.

 

Moles C2H6O2 = 700 g / 62.07 g/mol = 11.28 mol C2H6O2

 

molarity = 11.28 mol / 0.3 kg H2O = 37.59 molal

__________________________

 

Molarity = moles of solute/L of solution

there is 1 kg of solution has a volume of:

 

1000 g / 1.05 g/mL = 952 mL = 0.952 L

 

Molarity = 11.28 mol / 0.952 L = 11.85 M

___________________________

 

Mole fraction ethylene glycol = moles ethylene glycol / (moles ethylene glycol + moles H2O)

 

moles ethylene glycol = 11.28

moles H2O = 300 g / 18.0 g/mol = 16.67 mol H2O

 

mole fraction = 11.28 /( 11.28 + 16.67) = 0.404

You might be interested in
Which of the following is a solution? <br> Steel <br> Milk <br> Plastic <br> Water
Anit [1.1K]
Milk. Everything else is a compound/alloy.
4 0
3 years ago
How many ml of concentrated hydrochloric acid would be required to make 1 L of a 0.2 M solution? Assume that concentrated hydroc
fgiga [73]

<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL

<u>Explanation:</u>

To calculate the volume of concentrated solution, we use the equation:

M_1V_1=M_2V_2

where,

M_1\text{ and }V_1 are the molarity and volume of the concentrated solution

M_2\text{ and }V_2 are the molarity and volume of diluted solution

We are given:

Conversion factor:  1 L = 1000 mL

M_1=12.1M\\V_1=?mL\\M_2=0.2M\\V_2=1L=1000mL

Putting values in above equation, we get:

12.1\times V_1=0.2\times 1000\\\\V_1=16.53mL

Hence, the volume of concentrated hydrochloric acid required is 16.53 mL

3 0
3 years ago
What inspired Mendeleev to create his organization for the elements
const2013 [10]

Dimitri Mendeleev was inspired primarily by the work of Antoine Lavoisier and his work on writing the first extensive list of known elements. Lavoisier also collaborated in the construction of the metric system and worked to develop a better nomenclature for chemical compounds which parts are still used today.

7 0
3 years ago
HELPPPP I NEED THE ANSWER i'M STUCK
Tasya [4]

Answer:

carbon, nitrogen,oxygen,flourine

3 0
3 years ago
Help me
Valentin [98]

Answer:

South American

Explanation:

When you look at a map of plates, only South American forms a boundary with the African plate out of those specific plates

6 0
3 years ago
Read 2 more answers
Other questions:
  • Coincide la antártica con el polo norte geográfico
    5·1 answer
  • Consider 1.5 L of air in a patents lungs at 37.0 C and 1.00 atm pressure. What is the volume would this air occupy if it were at
    14·1 answer
  • When we convert one metric unit to another the conversion factor is always exactly equal to 1. true or false
    12·1 answer
  • Which word identifies the shaking that results from movement under Earth's surface?
    6·2 answers
  • Using the equation below, calculate how many grams of water (H2O) you have if you start with 12 grams of
    7·1 answer
  • Water is said to be a good solvent for polar solutes because it has a negative end and a positive end. This explains why (IONIC/
    9·1 answer
  • How many liters are in 1576.94 mL?
    14·1 answer
  • What determines how molecules are redistributed in diffusion?​
    13·1 answer
  • HCIO,
    11·2 answers
  • Which statement describes clean air as a natural source
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!