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FinnZ [79.3K]
1 year ago
10

The polypropylene (repeat unit CH₃CHCH₂) in a plastic toy has a molar mass of 2.8x10⁵ g/mol and a repeat unit length of 0.252 pm

. Calculate the radius of gyration.
Chemistry
1 answer:
VMariaS [17]1 year ago
4 0

Polymer can be defined as the large molecule which is made up of repeating units of smaller molecules which are linked by covalent bonds.

Polymer mass : The molecular weight of the polymer is called as polymer mass.

μ(polymer)=μ(repeat)∗n                     where n is degree of polymerization.

Rg=  √(nl2/6R)

where,                                                 R = Radius of gyration.

n = degree of polymerization.

l = length of each repeating unit.

for calculating n;

MPolymer= Mrepeat∗n

=(2.8∗10^5g/mol)=[42.08g/mol]∗n

n=(2.8∗105g/mol)/(42.08g/mol)=6.7∗103.n

The molar mass of repeating unit = 42.08 g/mol

Rg= √(  nl2/6R )

=  √ (6.7∗103∗(0.252∗10^(−10))2 /6)

 Rg= 8.4pm radius of gyration.

To know more about Radius of gyration here

brainly.com/question/15515779

#SPJ4

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If the outside of your flask is not dry when the first mass determination is made and it is dried for the second mass determinat
svlad2 [7]

Answer:

You'll experience a grater deviation

Explanation:

<em>You'll experience a greater deviation in your measurements, meaning your measures will have a bigger difference between them, and the greater these deviations the less accurate will be the measuring.</em> This happens mainly because you're not replicating the measurement with the exact same conditions, in one of them you'll have an extra mass from the water.

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3 years ago
1. Convert 67500 mg to the unit hg
Mice21 [21]

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0.675

Explanation:

4 0
3 years ago
A 250 ml solution of 2.0 M NaOH is diluted to 1.0 liter. What is the final concentration of the solution?
Alex73 [517]

Answer:

Diluted concentration is 0.5M

Explanation:

Let's solve this with rules of three, although there is a formula to see it easier

In 1000 mL (1L), we have 2 moles of NaOH

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These moles will be also in 1 L of the final volume of the diluted solution

More easy:

1 L of solution has 0.5 moles of NaOH

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3 0
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Read 2 more answers
Identify the compounds that are soluble in both water and hexane.
dlinn [17]

Answer:

The compound which are boh soluble in water and hexane is

B. Ethanol and 1-propanol  

Explanation:

The compounds ethanol and 1-propanol are soluble in both hexane and water.

It is soluble in water as both  consists of polar end due to hydrogen bonding present in the  -OH functional group.

and both are soluble in hexane as they contain a non polar end and the alliphatic hydrocarbon chain in them.

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3 years ago
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