Chem Exam - ‘98 1. Solve the following problem related to the solubility equilibria of some metal hydroxides in aqueous solution. (a) The solubility of Cu(OH)2(s) is 1.72 x10–6 g/100. mL of solution at 25° C. (i) Write the balanced chemical equation for the dissociation of Cu(OH)2(s) in aqueous solution. Cu(OH)2 Cu 2+ + 2 OH – (ii) Calculate the solubility (in mol/L) of Cu(OH)2 at 25 °C. (1.72 x10–6 g/0.100 L)(1 mol/97.5 g) = 1.76 x10–7 mol/L (iii) Calculate
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Behind him walked his opposite‚ huge man‚ shapeless of face‚ with large‚ pale eyes‚ with wide‚ sloping shoulders; and he walked heavily‚ dragging his feet a little the way a bear drags his paws. His arms did not swing at his sides‚ but hung loosely.” This quote talks about lennie being the giant character and George being the small character. Lennie could be considered slow but in the story Steinbeck never directly tells the reader. In this quote they compare Lennie to a bear dragging his paws‚ they use
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Abstact 1) Introduction An adulterant is a chemical substance which should not be contained within other substances‚ such as food‚ beverages‚ fuels‚ for legal or other reasons. The addition of adulterants is called adulteration. The word is appropriate only when the additions are unwanted by the recipient. Otherwise the expression would be food additive. Adulterants when used in illicit drugs are called cutting agents‚ while deliberate addition of toxic adulterants to food or other products
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is very smart and uses his swave intellect to escape many dangerous and tough situations. As well he is a convincing speaker and can convince who he is talking to do his bidding. He is a strong willed man and now that he is home from his 20 year treacherous journey‚ he wants to be happy with his wife and finally learn what a great man his son had become. The suitors have been in Odysseus kingdom for about the last 10 years‚ eating his food‚ drinking his wine‚ killing his livestock‚ and most importantly
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of Experiment: Observation of Chemical Changes Purpose: To examine the reaction of common chemicals from household consumer products‚ and the changes they undergo. Procedure: After combining the chemicals listed below in Data Table 1‚ I observed the mixture against white and dark backgrounds by slipping white and black paper underneath the well plate. For every reaction‚ I wrote down the chemical combination‚ the well number‚ and my observations of the chemical reactions against the white and
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Classifying Chemical Reactions Introduction Pre-lab questions 1. Which reactants used in this experiment are flammable? Discuss the safety precautions that are necessary when working with flammable materials in the lab? 2. Summarize the following description of a chemical reaction in the form of a balanced chemical equation? 3. Common observations of a chemical reaction are described in the introduction section. For each observation‚ name a common or everyday occurrence that must involve a chemical reaction
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Materials & Methods: This aim of this experiment was to determine whether or not a chemical reaction occurred after the mixing of various chemicals. The evolution of a gas‚ the formation of precipitation‚ and the change of temperature or color are all indicative of a chemical reaction. It was assumed that a reaction did not take place if the mixture of chemicals exhibited none of these characteristics. Several precipitation‚ complex-ion formation‚ redox‚ and acid-base reactions were performed.
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BIOLOGY 22 MODULE 1 – Chemical Basis of Life v2.0 * Levels of Organization – biological functions are ultimately based on the properties of atoms and molecules * Subatomic particles – neutrons‚ electrons‚ protons * Atoms * Compounds * Complexes of compounds * Organelles – bodies within cells that perform specific functions * Cell * Specific combination of organelles * Can metabolize and reproduce * Least elaborate living structure * Significance
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movie representing her actions‚ as well. The acclaimed movie‚ The Young Victoria‚ stars Queen Victoria‚ played by Emily Blunt‚ and Prince Albert‚ who prove their selfless love for each other after living in other people’s worlds. The movie shows Victoria’s struggle to find herself while she finds her allies too. I believe that the movie‚ The Young Victoria‚ is not an accurate portrayal of the real life events of Queen Victoria because of incorrect representation of Victoria’s love interest Albert
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Bilal Al- Qureshi‚ Said Business School‚ University of Oxford 2010 American Chemical Corporation HBS Case Number: 9-290-102 Executive Summary The American Chemical Corporation (AMC) is a large‚ diversified chemical producer. In 1979‚ AMC was forced to issue a tender to sell a Sodium Chlorate plant‚ near Collinsville‚ Alabama. Dixon‚ a specialty chemicals company‚ was willing to purchase the aforementioned plant for $12m with the option to invest a further $2.25m on laminate technology. The
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