Sentences: Simple‚ Compound‚ and Complex A common weakness in writing is the lack of varied sentences. Becoming aware of three general types of sentences--simple‚ compound‚ and complex--can help you vary the sentences in your writing. The most effective writing uses a variety of the sentence types explained below. 1. Simple Sentences A simple sentence has the most basic elements that make it a sentence: a subject‚ a verb‚ and a completed thought. Examples of simple sentences include the following:
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dioxide (CO2) heterotrophic – carbon is obtained from organic compounds mixotrophic – carbon is obtained from both organic compounds and by fixing carbon dioxide 2. How the organism obtains reducing equivalents used either in energy conservation or in biosynthetic reactions: lithotrophic – reducing equivalents are obtained from inorganic compounds organotrophic – reducing equivalents are obtained from organic compounds 3. How the organism obtains energy for living and growing:
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substance would fit into their discrete groupings. Chemist use bonding types‚ electrical conductivity‚ melting and boiling point and physical properties to classify substances into four main groups‚ which are: • Metallic substances • Ionic compounds • Covalent molecular and; • Covalent network substances Metallic substances are substances that are made up of one or more metal. They have regular 3D lattice of positively charged ions. Metallic substances are bond together by metallic
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Lesson 03.01: History of the Periodic Table Explain how scientific observations led to the development of‚ and changes to‚ the periodic table. Russian chemist Dmitri Mendeleev set out to organize the 63 known elements according to their properties. Mendeleev wrote the name‚ mass‚ and chemical properties of each element on a separate card and arranged the cards by various properties‚ looking for trends and patterns. When he arranged the elements by increasing atomic mass‚ Mendeleev noticed that similar
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(salt) compounds are able to hold loose bonds with water molecules. A hydrate is a compound that incorporates water molecules into its crystalline lattice structure (McGraw-Hill Ryerson‚ 2014). Identifying a compound as hydrated or anhydrous is important as the mass of the compound increases if it contains water molecules. In nature‚ hydrates exist with a fixed ratio of water molecules bound to each formula unit. These salts are able to release water to become anhydrous‚ or the anhydrous compound can
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VI: Conclusion: The melting point of a compound is the temperature at which the solid is in equilibrium with its liquid. A solid compound changes to a liquid when the molecules acquire enough energy to overcome intermolecular forces holding them together in an crystalline lattice structure. The melting point range is defined as the span of temperature from the point at which the crystals first begin to liquefy to the point at which the entire sample is liquid. This data can be tabulated experimentally
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Chemical Bonding Lab Chemical compounds are combinations of atoms held together by chemical bonds. These chemical bonds are of two basic types—ionic and covalent. Ionic bonds result when one or more electrons from one atom or group of atoms is transferred to another atom. Positive and negative ions are created through the transfer. In covalent compounds no electrons are transferred; instead electrons are shared by the bonded atoms. The physical properties of a substance‚ such as melting point
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and Compression Compound bar: In certain application it is necessary to use a combination of elements or bars made from different materials‚ each material performing a different function. In over head electric cables or Transmission Lines for example it is often convenient to carry the current in a set of copper wires surrounding steel wires. The later being designed to support the weight of the cable over large spans. Such a combination of materials is generally termed compound bars. Consider
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Extraction: Separation of an Organic Acid‚ Base and a Neural Compound Introduction/Background Acid base extraction is a widely used commercial method in separating acids‚ bases and neutral compounds. This is concept is based on several physical properties of the compounds‚ such as boiling point‚ melting points and solubility. The different solubility properties of the protonated and non-protonated forms of these compounds depend on the functional groups present‚ such as carboxylic
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Figure 1 describe the total phenolic content of coffee (raw‚ roasted and spent) and black tea (raw and spent tea). Both of coffee and black tea contain reasonable amount of phenolic‚ however‚ the total phenolic compound in black tea is much higher than those of coffee‚ which was found to be 104.3 and 187.50 mg GAE /g in raw coffee and black tea‚ respectively. Similarly‚ the spent coffee contained less amount of phenolic (97.87mg GAE /g) than those in spent black tea (152.87 mg GAE /g). The analysis
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