Properties of Different Bonds An ionic compound forms from a nonmetal and metal element. A covalent compound is formed by two non metal elements. A metallic compound is formed by two metal elements. Metallic compounds have generally high melting points‚ are loose and flexible with their electrons‚ conduct electricity well‚ and have low solubility in water. Ionic compounds are generally crystals‚ have a high melting point‚ and usually have high solubility in water and conduct electricity well when
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Question 1 Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength () and frequency () are related according to the equation where is the speed of light (). The energy ( in joules) contained in one quantum of electromagnetic radiation is described by the equation where is Planck’s constant (). Note that frequency has units of inverse seconds ()‚ which are more commonly expressed as hertz (). Part A A microwave oven operates at 2.40 . What is the wavelength
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Decomposition Reaction-Electrolysis of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt
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Name: _____________________________ Submit Worksheets for Credit Stereochemistry Workshop 1. Assign the marked asymmetric centers with R or S designations. 2. Rank each of the following sets of substituents (highest priority substituent = 1; lowest priority substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers
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Experimental Chemistry In this topic‚ you will learn: www.revision-notes.co.cc Hazard Warning Labels www.revision-notes.co.cc Measurement: Mass‚ Volume‚ Time and Temperature www.revision-notes.co.cc www.revision-notes.co.cc Collection of Gases www.revision-notes.co.cc Identification of Gases www.revision-notes.co.cc The Particulate Nature of Matter In this topic‚ you will learn: www.revision-notes.co.cc States of Matter Kinetic Theory www.revision-notes
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values that have trailing zeros only to the left of the decimal point are ambiguous and should be expressed in scientific notation. We must take note that the chemistry textbook (Silberberg 6e) states that placing a decimal point to the right of some trailing zeros (example: 300.) will make the zeros significant. However in General Chemistry‚ we do not follow this rule. If we want to write a whole number with trailing zeros we must use scientific notation to show which zeros are significant. When
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Sustainability and Organic Foods People nowadays are getting into the “go green” lifestyle while others continue to live without thinking about the effects they have on the environment. Why do people go green? It can save you money‚ it is the right thing to do‚ it is healthier because there are less toxins and less illness‚ it is helping future generations‚ and it is a chance to connect with the local community and spread the word. To go along with this lifestyle and its benefits‚ catering companies
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Elisa Hofmeister Kokesh Hour 3 AP Chemistry 5-29-12 The Chemistry of Coffee Green Coffee- Before coffee is roasted‚ it is referred to as “green coffee”. The green coffee is primarily made up of caffeine‚ lipids‚ carbohydrates‚ proteins (amino acids)‚ and organic acids (although inorganic acids exist in coffee as well). These groups are quite stable in the green phase‚ and it is the carbohydrates‚ proteins‚ and acids that will undergo significant reactions during roasting to produce coffee
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CHEM 3305 - 001 Organic Chemistry 1 Dr Michael Findlater Spring Semester‚ 2013 Stereochemistry • Stereochemistry refers to the three-dimensional structure of a molecule. • As a consequence of stereochemistry‚ apparently minor differences in 3D structure can result in vastly different properties. • We can observe this by considering starch and cellulose‚ which are both composed of the same repeating unit. Stereochemistry of Starch and Cellulose Figure 5.2 • In cellulose
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1 HIGHER SECONDARY MODEL EXAMINATION HSE II Max.marks: 60 CHEMISTRY Time: 2.45 hrs General instructions All questions are compulsory Cool-off time is 15 minutes 1] Defects modify the properties of crystals [4 marks] A] Give differences between Schottky and Frenkel defects [2.0] B] On heating zinc oxide becomes yellow in colour. Why? [1.0 ] C] Alkali metal halides on heating in presence of alkali metal produce characteristic colours.Give reason [1.0] 2] Colligative
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