physical chemical properties essay Oakland Schools SCoPE Science Assessment Packet 7th Grade Unit 2 – Physical and Chemical Properties and Changes of Matter Assessment Packet Grade 7‚ Unit 2: Physical and Chemical Properties and Changes of Matter Overview This packet contains a set of assessment resources to be used with the Physical and Chemical Properties and Changes of Matter Unit of the 7th grade Scope Science Curriculum. A test blue print is
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Lab Report Marisa McKinney P. 2 Purpose: To investigate the periodic variation of density in Group 4A elements. Background: When the elements are arranged in order of increasing atomic number‚ they exhibit periodic recurrence of properties. Elements in the same group in the periodic table tend to have similar physical and chemical properties. These similarities are due‚ in large part‚ to similarities among the electron configurations of the elements in a group. You can find periodic
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Methanol(CH₃OH) is a simple compound which is also known as methyl alcohol or wood alcohol.Methanol is colourless‚flammable and most importantly very toxic.They are naturally produced from volcanic gases‚vegetation and microbes.They can also be produced in the industry by synthesizing gas.The largest and the most important use of methanol is as a feedstock in the plastic industry.They are used to make methanal and hence variety of plastics‚based on reactions with phenol‚carbamide(urea) and melamine
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CHM1022 Tutorial 2 – Semester 2‚ 2012 (Chemical Equilibria) 1. The reaction 2 HCl(g) +I2(s) [pic] 2 HI (g) + Cl2(g) has Kc = 1.0 x 10-34 at 25˚C. If a 1.00 L reaction vessel initially contains 0.100 mol of each HCl and solid I2‚ what are the concentrations of HI and Cl2 at equilibrium? 2. Consider the following gas-phase reaction and equilibrium constant at 25 oC: 4 HCl(g) + O2(g) [pic] 2 Cl2(g) + 2 H2O(g) The concentrations of all species were measured at a particular
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that is solid at room temperature (25 °C). The metal has been heated until it turns to vapour. D Temperature / ºC C B A Time Which part of the graph represents the period of time when the metal is melting? © Cambridge University Press IGCSE Chemistry Self-assessment practice test 1 1 3 This diagram shows ice cubes floating on the surface in a glass of fizzy drink. ice cubes glass drink bubbles In which of these are the particles close together but free to move past each other? A B C
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3/4) * The name of the element in the periodic table that is dedicated to his work. (Level 3/4) * Who were John Newlands‚ Lothar Meyer and John Dalton? What happened to their discoveries? (Level 6) * Mendeleev wrote the Principles of Chemistry in 1870. What did he say about the elements? (Level 5) * What were Dimitri
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ways to examine the subject of alchemy‚ including alchemy as a source of symbolism‚ psychology‚ and mysticism. It has also been an influence on the world view of various writers‚ artist‚ and musicians. The focus of this report is alchemy as a pre-chemistry‚ which gave a new impulse towards the preparation of medicinal remedies and also was a major influence on today’s scientific investigations.<br><br>Alchemy is an ancient art‚ practiced in the Middle Ages. The fundamental concept of alchemy stemmed
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In this lab we studied stoichiomentry. We also reviewed the mole-mole relationship between copper and iron in a chemical reaction. The stoichiomentry of mass is that during the heating the experiment does loose mass .This mean that mole and mass did change. An Example of real world is Masses and volumes of products are extremely important in key reactions such as the deployment of air bags in vehicles‚ carbon dioxide production to help bread rise‚ and the Production of ammonia gas for industries
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1. Iron has a BCC crystal structure‚ an atomic radius of 0.124 nm‚ and an atomic weight of 55.85 g/mol. Compute its theoretical density. 2. Cite the primary differences between elastic‚ inelastic‚ and plastic deformation behaviors. 3. Of those metals listed in Table 1‚ (a) Which will experience the greatest percent reduction in area? Why? (b) Which is the strongest? Why? (c) Which is the stiffest? Why? Table 1 Yield Tensile Strain Fracture Elastic Strength Strength at Strength Modulus
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1) At equilibrium‚ __________. A) all chemical reactions have ceased B) the rate constants of the forward and reverse reactions are equal C) the rates of the forward and reverse reactions are equal D) the value of the equilibrium constant is 1 E) the limiting reagent has been consumed 2) Which of the following expressions is the correct equilibrium-constant expression for the reaction below? HF (s) + H2O (l) ⇌ H3O+ (aq) + F- (aq) A) [HF][H2O] / [H3O+][F-] B) 1 /[HF]
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