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3 years ago

What does the monomer unit of Polyester look like? And what’s its chemical formula?

Chemistry

1 answer:

AlladinOne [14]3 years ago

6 0

Answer:

The monomers of polyesters are,

(i) A Dicarboxylic Acid

(ii) A Dialcohol

Explanation:

As depicted from name polyester is a macromolecule which contains numerous ester functional groups. Ester is formed by the condensation of Carboxylic acid and alcohol as shown,

R-COOH + R'OH → RCOOR' + H₂O

Therefore, in order to utilize this reaction for the formation of long chain of polyesters then one can use a dicarboxylic compounds and dialcohol compounds. This will allow to propagate the chain length depending upon the requirement. Hence, the general reaction for the formation of polyester is shown below. The circle and rectangle specifies different moieties which imparts different characters to the polyester.

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What did early Greeks believe the world was made of

timurjin [86]

Answer: made up of an infinite number of indestructible atoms in unpredictable motion.

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3 years ago

How many moles are there in 5.699 liters of neon gas at STP? Express your answer with the appropriate significant figures and un

Svetradugi [14.3K]

Answer:

The number of moles: 0.25442 moles

Explanation:

One mole of Neon gas will occupy 22.4 at STP.

5.699L consists of $\frac{5.699}{22.4}$ = 0.25442 moles.

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2 years ago

If the theoretical yield of a reaction is 0.110 g and the actual yield is 0.104 g , what is the percent yield?

Westkost [7]

Theoretical Yield is an Ideal yield with 100 % conversion of reactant to product. It is in fact a paper work.

While,

Actual Yield is the yield which is obtained experimentally. It is always less than theoretical yield because it is not possible to have 100% conversion of reactants into products. Even some amount of product is lost while handling it during the process.

Percentage Yield is Calculated as,

%age Yield = Actual Yield / Theoretical Yield × 100

Data Given:
Actual Yield = 0.104 g

Theoretical Yield = 0.110 g

Putting Values,

%age Yield = 0.104 g / 0.110 g × 100

%age Yield = 94.54 %

3 0

2 years ago

True or False. Will give brainliest if correct!

Jet001 [13]

i think its is true

(............)

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2 years ago

Read 2 more answers

Increasing the temperature of the solvent ____________________ the solubility of a solid solute and _______________________ the

Marina86 [1]

Answer:

increase in solvent temperature will increase the solubility of solid particle but decreases the solubility of gas particle.

Explanation:

In solid particle when temperature increases its help to break apart the solid particle and increase in kinetic energy of solvent results in increase in solubility of solid particles in solvent.

but in gas solute, increase in temperature of solvent causes the increase in motion of gas molecules means increase in kinetic energy of molecules in the gas which results in breakage of inter molecular bonds and removal of the molecules from the heated solution.

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2 years ago