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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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One peanut M&M weighs approximately 2.33 g.
Sphinxa [80]

Answer:

There are 23076 peanut M&M's in 53.768 kg of M&M's.

Explanation:

First we <u>convert 53.768 kg into g</u>:

  • 53.768 kg * 1000 = 53768 g

Then we <u>divide the total mass of M&M's by the mass of one peanut M&M,</u> in order to calculate the answer:

  • 53768 g / 2.33 g = 23076

So there are 23076 peanut M&M's in 53.768 kg of M&M's.

3 0
2 years ago
Fill in the word that correctly completes this sentence.
crimeas [40]
Mixtures are made up of 2 or more substances that are together in the same place but aren’t chemically bonded.
5 0
3 years ago
ASAP I WILL GIVE BRAINLIEST!Which arrow represents the change of state described above? The diagram shows changes of state betwe
lilavasa [31]

Answer:

O

Explanation:

The atoms lose energy during a change of state, but can still slide past each other; gas to a liquid.

7 0
2 years ago
BRAINLIEST PLEASE HELP!!!
Natalka [10]
Answer : first opinion and also last
Expiation : Note that these last two reactions, and 2H + 2H → 4He + γ, .Nuclear fusion is a reaction in which two nuclei are combined to form a larger nucleus. Nuclear fusion is a reaction in which two nuclei are combined, or fused, to form a larger nucleus. We know that all nuclei have less mass than the sum of the masses of the protons and neutrons that form them. The missing mass times c2 equals the binding energy of the nucleus—the greater the binding energy, the greater the missing mass.
5 0
2 years ago
If you start with 0.020 g of Mg, how many moles of H2 will you make if the reaction is complete?
irina [24]

If one starts with 0.020 g of Mg, 0.0008 moles of H2 would be made if the reaction is complete.

Going by the balanced equation of reaction in the image, 1 mole of Mg will produce 1 mole of H2 in a complete reaction.

If 0.020 g of Mg is started with:

mole of Mg = mass/molar mass

                        = 0.020/24.3

                            = 0.0008 moles

Since the mole of Mg to H2 is 1:1, thus, 0.0008 moles of H2 will also be made from the reaction.

More on stoichiometry can be found here: brainly.com/question/9743981

6 0
2 years ago
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