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
Colt1911 [192]
3 years ago
14

Question 7 When of benzamide are dissolved in of a certain mystery liquid , the freezing point of the solution is lower than the

freezing point of pure . On the other hand, when of iron(III) chloride are dissolved in the same mass of , the freezing point of the solution is lower than the freezing point of pure . Calculate the van't Hoff factor for iron(III) chloride in . Be sure your answer has a unit symbol, if necessary, and round your answer to significant digits.
Chemistry
1 answer:
charle [14.2K]3 years ago
3 0

Answer:

See explaination

Explanation:

moles of benzamide = mass / Molar mass of it = 70.4g / ( 121.14g/mol) = 0.58 mol

Molality = moles of solute ( benzamide) / ( solvent mass in kg) = 0.58 mol / ( 0.85kg) = 0.6837

we have formula dT = i x Kf x m , where dT = change in freezing point = 2.7C , i = vantoff factor = 1 for non dissociable solutes , Kf = freezing oint constant of solvent , m = 0.6837

hence 2.7C = 1 x Kf x 0.6837m

Kf = 3.949 C/m

we use this Kf value for calculating i for NH4Cl , where moles of NH4Cl = ( 70.4g/53.491g/mol) =1.316 mol

molality = ( 1.316mol) / ( 0.85kg) = 1.5484 , dT = 9.9

hence 9.9 = i x 3.949C/m x 1.5484 m

i = 1.62

You might be interested in
Help me asappp please
Basile [38]

Answer:

wait

Explanation:

wait

3 0
3 years ago
In what way do the atoms in the same row of the Periodic Table increase from left to right?
zheka24 [161]

Answer:

As you move from left to right, the nucleus gains protons. This increases the positive charge of the nucleus and its attractive force on the electrons. At the same time, electrons are added to the atoms as you move from left to right across a period.

Explanation:

5 0
3 years ago
Explain why pentane has a higher boiling point than butane
creativ13 [48]

Answer: Larger molecules have stronger London forces.

Explanation:

Pentane therefore has a stronger force than butane.

8 0
2 years ago
Find the mass of 4.5 moles of H3PO4
Contact [7]

Hey there!

H₃PO₄

Find molar mass.

H: 3 x 1.008 = 3.024

P: 1 x 30.97 = 30.97

O: 4 x 16 = 64

---------------------------------

                  97.994 grams

The mass of 1 mole of H₃PO₄ is 97.994 grams.

We have 4.5 moles.

97.994 x 4.5 = 440

The mass of 4.5 moles of H₃PO₄ is 440 grams.

Hope this helps!

6 0
2 years ago
How much copper is in 4.64 grams of copper
Romashka [77]

Answer:

4.64 grams.

Explanation:

without stating a desired unit, stating the answer in any unit is acceptable. So you can use grams and the problem is done for you

6 0
3 years ago
Other questions:
  • Besides water, what is the product of a Neutalization Reaction between HNO3 and Al(OH)3?
    7·2 answers
  • Do ice and snow have the same chemical bonds ​
    14·2 answers
  • Why did sir isaac newton refuse a glass of wine before sitting down to formulate the rules for differentiation?
    14·1 answer
  • What is true about two neutral atoms of the element gold
    6·1 answer
  • How many moles are there in 140.2 g of Ca
    10·2 answers
  • Determine the value of the equilibrium constant (report
    5·1 answer
  • Now look closely at the patterns in the table. Compare the elements in each column and row. What can we say about
    6·1 answer
  • An electron na hydrogen atom moves from level to level 4 The electron then drops from level 4 to level 2. Which statement
    9·1 answer
  • What is the concentration of a solution containing 0.32 moles of NaCl in 3.4 liters?
    7·2 answers
  • What is the chemical name of the compound K2SO4? Use the list of polyatomic ions and the periodic table to help you answer.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!