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
taurus [48]
3 years ago
9

An antifreeze solution is prepared containing 40.0 g of ethylene glycol (molar mass = 62.0 g/mol) in 60.0 g of water. Calculate

the freezing point of this solutions A.-20.1°C B.0.518°C C.20.1°C D.120.1°C
Chemistry
1 answer:
Schach [20]3 years ago
6 0
Kf = 1.86

Number of moles :

Molar mass <span> ethylene glycol = 62.0 g/mol

40.0 / 62.0 => 0.645 moles 

Molality :

mass of solvent = 60.0 / 1000 => 0.06 kg

m = moles / kg solvent

m = </span><span>0.645 / 0.06

= 10.75 m

</span>Δt = Kf x molality

Δt = (- 1.86) x 10.75 => - 20.1ºC
<span>
Answer A

hope this helps!</span>
You might be interested in
Where would you expect to find an element with the greatest electronegativity?
beks73 [17]
As you move from left to right of the periodic table, the element becomes more negative.
4 0
4 years ago
Nguyên tử X có tổng số hạt là 34, số khối X là 56. Điện tích hạt nhân của X là?
Verizon [17]

Answer:

can u tell the question in english

8 0
2 years ago
5. Hydrogen &amp; oxygen react chemically to form water. How much water
stepladder [879]

39.25 g of water (H₂O)

Explanation:

We have the following chemical reaction:

2 H₂ + O₂ → 2 H₂O

Now we calculate the number of moles of each reactant:

number of moles = mass / molar weight

number of moles of H₂ = 14.8 / 2 = 7.4 moles

number of moles of O₂ = 34.8 / 32 = 1.09 moles

We see from the chemical reaction that 2 moles of H₂ will react with 1 mole of O₂ so 7.4 moles of H₂ will react with 3.7 moles of O₂ but we only have 1.09 moles of O₂ available. The O₂ will be the limiting reactant. Knowing this we devise the following reasoning:

if        1 moles of O₂ produces 2 moles of H₂O

then  1.09 moles of O₂ produces X moles of H₂O

X = (1.09 × 2) / 1 = 2.18 moles of H₂O

mass = number of moles × molar weight

mass of H₂O = 2.18 × 18 = 39.25 g

Learn more about:

limiting reactant

brainly.com/question/7144022

brainly.com/question/6820284

#learnwithBrainly

6 0
3 years ago
How do valence electrons interact between non polar covalent, polar covalent, and ionic bonds?​
iVinArrow [24]

Answer:

In non-polar covalent bonds, the electrons are equally shared between the two atoms. For atoms with differing electronegativity, the bond will be a polar covalent interaction, where the electrons will not be shared equally.

Explanation:

i did some reasherch so there^^

5 0
3 years ago
Someone help me with this asap for 5p points and BRAINLIEST THANK YOU
GaryK [48]

Answer:

High trainability allows the owner to train the dog to handle certain things--some dog can be trained as police dogs and can be taught various jobs, so high trainability is very important

When a dog is Viscous, the dog will keep people away from your house, they will be able to keep danger away and because they are viscous they will be able to handle danger.

Loud bark- A loud bark from a dog can help alert other people when there is a intruder, it makes alot of noise so they can attract attention easily.

Quiet Bark- Ideal for pet owners who do not like noise, they bark quietly so they are not a bother to work or anyone doing something.

7 0
2 years ago
Other questions:
  • The strongest bases are hydroxides
    6·2 answers
  • Plzz help me with these questions....!!!
    11·1 answer
  • Find the perimeter of the square and then convert the answer to meters
    11·1 answer
  • WHAT DID YOU OBSERVE HAPPENED WHEN AN S-WAVE TRAVELED INTO A LIQUID?
    9·1 answer
  • Ra/te me from 0 - 10<br> Im bored girls and guys<br> (i dont judge) :)
    14·1 answer
  • Help Tell me the answer.
    6·1 answer
  • The different combinations that genes within a population can have is known as
    8·1 answer
  • How do positive charges in the nucleus balance​
    15·1 answer
  • Can someone pleas help
    8·1 answer
  • 3. In the apparatus below, the seawater is an example of a(n) ——
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!