WebProperties. Uses. Low density poly (ethene), LDPE. Flexible, unreactive, can be made into films. Most carrier bags, bubble wrap. High density poly (ethene), HDPE. Strong, flexible, … is an example of corrosion. It occurs when iron or steel reacts with oxygen and wa… The main stages in the Haber process. In the Haber process: nitrogen (extracted f… Life cycle stage Plastic carrier bags Paper carrier bags; Raw materials: Crude oil i… Water is essential for life. Water that is safe for humans to drink is called potable … The human population is growing very quickly and many people argue that human… WebPolymers are large molecules of high relative molecular mass and are made by linking together large numbers of smaller molecules called monomers. Each monomer is a repeat unit and is connected to the adjacent units via covalent bonds. Polymerisation reactions usually require high pressures and the use of a catalyst. Many everyday materials such ...
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WebA polymer is a large molecule or a macromolecule which essentially is a combination of many subunits. The term polymer in Greek means ‘many parts’. Polymers can be found all around us. From the strand of our DNA, … WebNov 26, 2024 · The variety of life, both past and present, is extensive, but the biochemical basis of life is similar for all living things. Monomers are the smaller units from which … cso rungis lidl
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WebEnzymes Aqa gcse biology exam style questions b1 cell structure and transport gcse notes poly ethene poly propene poly chloroethene June 22nd, 2024 - Revision notes on the manufacture and structure of addition polymers physical properties of addition polymers help when revising for AQA GCSE chemistry Edexcel GCSE WebDec 27, 2024 · 1. To acidify the sample, add a few drops of dilute hydrochloric acid (HCl) to the sample. 2. Then, add a few drops of dilute barium chloride (BaCl 2) solution to the sample. 3. If sulfate ions are present in the solution, a white precipitate of barium sulfate (BaSO 4) will form. The reaction is: Ba²⁺ (aq) + SO 4 ²⁻ (aq) → BaSO 4 (s ... WebThe properties of a polymer also depend on the reaction conditions in which the polymer was created.This includes the temperature and pressure of the reaction. Polymers can be … ealing broadway taxi