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
adelina 88 [10]
3 years ago
9

Calculate the feed ratio of adipic acid and hexamethylene diamine that should be employed to obtain a polyamide of approximately

15,000 molecular weight at 99.5% conversion. What is the identity of the end groups of this product? Do the same calculation for a 19,000-molecular-weight polymer.
Chemistry
1 answer:
artcher [175]3 years ago
3 0

Answer:

r= 0.9949 (For 15,000)

r=0.995 (For 19,000)

Explanation:

We know that

Molecular weight of hexamethylene diamine = 116.21 g/mol

Molecular weight of adipic acid = 146.14 g/mol

Molecular weight of water = 18.016 g/mol

As we know that when  adipic acid  and hexamethylene diamine react then nylon 6, 6 comes out as the final product and release 2 molecule of water.

So

M_{repeat}=146.14+166.21-2\times 18.106\ g/mol

M_{repeat}=226.32\ g/mol

So

Mo= 226.32/2 =113.16 g/mol

M_n=X_nM_o

Given that

Mn= 15,000 g/mol

So

15,000 = Xn x 113.16

Xn = 132.55

Now by using Carothers equation we know that

X_n=\dfrac{1+r}{1+r-2rp}

132.55=\dfrac{1+r}{1+r-2\times 0.99r}

By calculating we get

r= 0.9949

For 19,000

19,000 = Xn x 113.16

Xn = 167.99

By calculating in same process given above we get

r=0.995

You might be interested in
What two elements were named after the United States?
kenny6666 [7]
Californium which is element 98, and americium:) those are a couple!! Hope that helps
5 0
3 years ago
Read 2 more answers
How many ammonium ions and how many sulfate ions are present in an 0.250 mol sample of (nh42so4?
Nastasia [14]
Thw answer is PHj78 JJ CP30 R2D2
7 0
2 years ago
Which statement best describes the amount of catalyst that remains at the end of a reaction?
Ivenika [448]
I believe the correct answer is C. The amount of catalyst is the same at the end as at the beginning of the reaction. Catalysts can't be consumed by the reaction thus is not D.
7 0
3 years ago
Read 2 more answers
Which chemical formula corresponds to this structural formula?
lys-0071 [83]
I think the answer is choice D
8 0
3 years ago
Read 2 more answers
Which would have more mass: a mole of sodium or a mole of copper? How do you know?
bearhunter [10]

Answer:

copper

Explanation:

so for this you can work out the mass for both and compare

so mass = moles × mr

so mass of sodium = 1 × 23= 23 g

and mass of copper = 1 × 63.5= 63.5 g

so copper have more mass :)

5 0
2 years ago
Other questions:
  • PLEASE HELP ASAP!!! 25 POINTS AND BRAINLIEST FOR FASTEST AND BEST ANSWER!!!
    12·1 answer
  • how does a jellyfish reproduce?explain the process and use the words polyp and medusa. hint my there are two stages of reproduct
    12·2 answers
  • What conditions must occur before nuclear fusion begins during star formation?
    6·1 answer
  • A liquid occupies 321ml and has a mass of 376g. what is the density of the liquid?​
    14·1 answer
  • Extracted from olives, canola, and corn are plant lipids and are liquid at room temperature.
    15·1 answer
  • How many people a year die from water born diseases
    14·1 answer
  • How many prime numbers are there between 0 and 75​
    12·2 answers
  • How many eight-packs of water would you need if 32 people
    15·1 answer
  • 1. Phosphorous reacts with bromine to form phosphorous tribromide. If 35.0 grams of bromine
    11·1 answer
  • Why does celsium have a lower first ionzation energy than rubidiumn.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!