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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“The Chemistry of Barbecue and You” is an article that creatively talks about the Maillard reaction. The Maillard reaction is a chemical reaction different foods undergo in order to acquire a distinctive flavor or the brownish color. According to the article it was first discovered by a French chemist Louis Camille Maillard who believed the Maillard reaction in foods can help cure diabetes. His assumption was wrong‚ however‚ the Maillard reaction is now known to give food flavor and make it look
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Ch1: Atomic structure Discovering the electron - When electricity flows in an aqueous solution of ionic compounds‚ the metal ions appears at the negative electrode (cathode). - The metal exists in the solution as positively charged particles known as ions. - A 1+ ion plus one unit of electricity gives one metal atom. - Low pressures gases conduct electricity very well. - The glass of containing vessel opposite the cathode (negatives electrode) glowed when the applied potential difference
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NEBOSH PRACTICAL INSPECTION Observations Hazards / Good Practice Control measures Immediate‚ medium‚ long-term actions Timescale (Immediate‚ 1 week‚ etc) (1) Good practice: Adequate lighting‚ ventilation‚ and low background noise levels. Continue the good practice. Ongoing (2) Good practice: Operating manuals were available for some of the work equipments. Immediate: Continue to make the manuals accessible to the relevant employees. Medium: Arrange a suitable place to hold the manuals
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The element of Nickel is number 28 which means it has 28 electrons and 28 protons (this is the atomic number). The atomic mass of Nickel is 58.71 g.mol^-1 which means that there are 30.69334 neutrons since you subtract the number of protons from the atomic mass to get the number of neutrons. The electronegativity of Nickel is 1.8 on the Pauling scale; this is the tendency of Nickel to attract a bonding pair of electrons. The density of Nickel is 8.9 g.com^-3 at 20°C and the melting point is 1454
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Maria Reyes iLab‚ Week #3 ATOMIC WEIGHT OF MAGNESIUM LAB Introduction The purpose of this lab was to determine the atomic weight of magnesium by measuring the amount of hydrogen gas evolved when hydrochloric acid reacted with magnesium. In order to measure the atomic weight I needed to measure the amount of the hydrogen gas that was evolved in reaction to the acid of the magnesium. The reaction used was: Mg + 2HCl --> H2 + Mg2+ (aq) + 2Cl- (aq). The major findings of this experiment were that
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5.1 Homework PG178 Questions: 2‚ 3‚ 5‚ 8‚ 9 2. Classify each of the following observations as an example of either a chemical or physical property a. Liquid nitrogen boils at -198˚C This is a physical property because it is a matter of changing state. b. Propane leaking from a damaged tank‚ ignites easily This is a chemical property because it is flammable. c. Silver jewelry tarnishes (darkens) in air This is a chemical property because the silver becomes dark because of oxygen d. Spilled
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Chemistry has been called the science of what things are. Its intent is the exploration of the nature of the materials that fabricate our physical environment‚ why they hold the different properties that depict them‚ how their atomic structure may be fathomed‚ and how they may be manipulated and changed. Although organic reactions have been conducted by man since the discovery of fire‚ the science of Organic chemistry did not develop until the turn of the eighteenth century‚ mainly in France at
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