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Vinil7 [7]
3 years ago
7

(7th grade chemistry) What makes a polyester, nylon and acrylic a synthetic materials/ products, in other words what happen duri

ng polyester, nylon and acrylic chemical reaction?(or what happen during a chemical reaction)
Chemistry
1 answer:
Andre45 [30]3 years ago
8 0

Explanation:

What you call polyester is technically polyethylene terephthalate or PET plastic molded into filaments that are then woven into fabric. It's made in a chemical reaction between ethylene glycol and therephthalic acid, and these chemicals are derived from fossil fuels, air, and water.

Nylons are condensation polymers or copolymers, formed by reacting difunctional monomers containing equal parts of amine and carboxylic acid, so that amides are formed at both ends of each monomer in a process analogous to polypeptide biopolymers. Most nylons are made from the reaction of a dicarboxylic acid with a diamine or a lactam or amino acid with itself

The binder resin in acrylic paint is man-made, most of the time in some sort of lab. It is made generally from the monomer methyl methacrylate and also any real common catalyst. The catalyst speeds up the reaction to where the monomers create extremely long chains. Which result in polymethyl methacrylate, an acrylic plastic polymer.

The pigments are also mostly made in labs/factories. Most of the time they are either pure elements like pure cobalt powder and carbon charcoal, or they basic bounded compounds like cadmium sulfide. To make cadmium sulfide you react cadmium chloride with hydrogen sulfide to make a bright yellow solid. It is then washed and heated to make a spectrum of different colors.

Basically all of acrylic paints are man-made through various chemical reactions.

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Answer:

The water cycle consists of 3 major processes.

**Evaporation

**Condensation.

**Precipitation.

01)Evaporation, : Evaporation is the process of a liquid s surface changing into a gas.

02)Condensation: Condensation is the process of gas changing to a liquid.

03)Precipitation: In the water cycle, water vapour in the atmosphere condenses and become liquid.

WHAT IS WATER CYCLE DO?

## The water cycle shows the continues movement of water within the Earth and atmosphere.

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*** Condenses-------- To Clouds

( Turn)

, and precipitations back to the form of rain and snow. Water do transform around the atmosphere.

Tip::: who made the water cycle???

The sun heat.

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Answer:combustion

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It took 4.5 minutes for 1.0 l helium to effuse through a porous barrier. how long will it take for 1.0 l cl2 gas to effuse under
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When The rate of effusion is inversely proportional to the √molar mass of the substance.
and we have R(He) = 1L / 4.5 min so,
R(He)/R(Cl2) = (molar mass of Cl2/ molar mass of He)^0.5
and when we have the molar mass of Cl2 = 70.9  & the molar mass of He = 4
so by substitution:
(1L/4.5 min)/ R(Cl2) = (70.9 / 4)^0.5
(1L/4.5 min) / R(Cl2) = 4.21
∴R(Cl2) = (1L/4.5 min) / 4.21 = 1L/ (4.5*4.21)min = 1 L / 18.945 min
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