Topic 5 – Bonding and Structure Revision Notes 1) Introduction • Atoms form bonds to get a full outer shell of electrons • There are three types of bonding: ionic‚ covalent and metallic • The structures produced by forming bonds are either giant or simple • The possible combinations of structure and bonding are giant ionic‚ simple covalent‚ giant covalent and giant metallic • Simple covalent is sometimes called simple molecular • Giant covalent is sometimes called giant
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Q-3. * Because the perfumed incense is in solid state and by lighting of it‚ it changes from solid state to gaseous state the moment it turns in to gaseous state and gases have a property to spread in all directions. After lightening the incense the molecules of perfume are in a gaseous state and mixing with the molecules of air in the room. All of them undergo random motion at all times as a result of the internal ("heat") energy that they have absorbed. The molecules often bump into each other
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CLASSIFICATION TESTS A. Acids There are relatively few suitable tests for carboxylic acids. Classification is based mostly upon solubility tests. If the compound is water soluble‚ test the aqueous solution of your compound with pH paper (also check the pH of the original water). If the compound is water-insoluble and it dissolves in 5% (1.5M) sodium hydroxide and 5% NaHCO3 solutions as performed in your solubility tests‚ it can be classified as a carboxylic acid. Establish an equivalence value
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Enzymes Research Enzyme optimum temperature The graph on the left compares enzymes activity with the temperature the enzymes are in. The optimum temperature for enzymes is 40 degrees but anywhere above that temperature the enzymes activity rapidly decreases because the enzymes denatures. Enzyme optimum pH This graph compares
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Product Proposal I. Calamansi Jam Calamansi Jam is a fruit spread made from pure and natural calamansi extracts and sugar. It is very nutritious and contains Vitamin C that can be of great help to our immune system. This product is delicious and at the same time good for our health. II. Related Product Introduction Food is any substance consumed to provide nutritional support for the body. It is usually of plant or animal origin‚ and contains essential nutrients
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It is ‘thiazolidine-2‚4-dione’ and not thiohydantoins as the reaction product of monosubstituted thioureas and chloroacetylchloride a a a a a The reaction products of monosubstituted phenylthioureas with chloroacetylchloride in a polyethylene glycol (PEG-400) medium and K2 CO3 as base/catalyst at an elevated temperature are exclusively thiazolidine-2‚4-diones and not thiohydantoins as has been reported. The core unit thiazolidine-2‚4-dione is essentially derived from chloroacetylchloride
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oxygen and sulfur. This substance cannot be a(n) Your Answer: | element. | | | An element cannot be broken down into other elements. | | 2. | | Pick the chemical change that occurs when a lit match is held under a piece of metal. Your Answer: | match burns | | | Chemical changes‚ which release heat and light‚ occur during the combustion process. | | 3. | | Which identification is incorrect for the elements listed? Your Answer: | Zn‚ zirconium | | | Zn is zinc; Zr is zirconium
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Box-Jenkins Modeling and Forecasting of Monthly Electric Consumption of PANELCO III Customers ______________________________ A Special Problem Presented To The Panel of Evaluators Mathematics Department Pangasinan State University Urdaneta City _______________________________ In Partial Fulfillment of The Requirement for the Degree of Bachelor of Science in Mathematics Major in Statistics ______________________________ By: Jake Anthony E. CantubaMarch 2014 APPROVAL SHEET In partial
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defined in numerous ways. There are heroes like Superman and Batman‚ but then there are the men and women that fight for our freedom. There are also individuals who are your friends or family that may seem to be your hero. In Tatiana de Rosnay’s Sarah’s Key‚ Sarah expresses her heroic self by exhibiting bravery‚ determination‚ and trustworthiness. Whether you call it daring‚ bold‚ spunky or audacity‚ Sarah had it. Bravery is a way of fearlessness‚ which she embodied. Sarah displayed courage by putting
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Peter Debye and his Contributions to Chemistry Abstract Dutch physicist Peter Debye studied under Arnold Sommerfeld‚ and developed several approaches using induced dipole moments and x-ray diffraction to study molecular structures. In 1912 he exhibited the Debye equation for dipole moments‚ a method to determine bond angles and the degree of polarity of covalent bonds‚ which allows the spatial configuration of molecules to be deduced with far greater accuracy than had previously
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