How is molar mass calculated and why is it useful? You have to multiply the atomic weight of each element by the number of atoms that it contains in a compound. Molar mass is useful because its used to change a measurement of mass to an amount of a substance such as the number of particles. 2.Define a mole in chemistry and give 3 examples equivalent units that are used in chemical calculations. A mole measures the amount of a substance. Three examples that are equivalent to a mole is molar mass‚
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1. What is the molarity of a solution of ammonium chloride prepared by diluting 50.00 mL of a 3.79 M NH4Cl solution to 2.00 L? 2. A student takes a sample of KOH stock solution and dilutes it with 100.0 mLof water. The student determines that the diluted solution is 0.046 M KOH‚ but has forgotten to record the volume of the original stock solution sample. The concentration of the stock solution is 2.09 M. What was the volume of the original sample of stock solution? 3. A chemist wants to prepare
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04.05 Chemical Reactions: Combustion: Lab Worksheet and Rubric Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Procedure: 1. Iron (III) and copper (II) sulfate solution 2. Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction. 3. 4. 5. Lead (II) nitrate and potassium iodide solutions 6. Pour about 2.0 mL of lead (II) nitrate into the test tube
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The Ka and Molar Mass of a Monoprotic Weak Acid Chemistry Lab 152 Professor: James Giles November 7‚ 2012 Abstract: The purpose of this experiment was to determine the pKa‚ Ka‚ and molar mass of an unknown acid (#14). The pKa was found to be 3.88‚ the Ka was found to be 1.318 x 10 -4‚ and the molar mass was found to be 171.9 g/mol. Introduction Acids differ considerable as to their strength. The difference between weak and
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Ce este Diplomaţia Publică? ‚‚Diplomaţia publică este faţa publică a diplomaţiei tradiţionale‚‚ (Ross‚ 2002 in Leonard‚ 2002:1) În cadrul diplomaţiei tradiţionale putem localiza şi conceptul de diplomaţie publică. Cele mai des folosite definiţii fiind celeale lui Signitzer şi Coombs (1992: 138) prin care se defineşte diplomaţia publică ca ‚‚o cale prin care guvernele‚ companiile şi diverse grupuri pot influenţa în mod direct sau indirect opiniile şi poziţiile publice care influenţează în mod direct
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In 500 years of no nation has everything stayed the same and Rome is no exception. While the economics of Rome managed to stay the same between 100 and 600 CE‚ and the laws of Rome with it‚ government and religion in 600 CE would not be recognizable to leaders and civilians from 100 CE. In 100 CE‚ the Roman economy was booming. The Roman Roads were used for trade within the empire‚ and the Silk Roads and Indian Ocean were traveled for imported goods. The government was as it had always been:
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In China there was a large amount of change that the country endured both politically and culturally between the years 100 C.E. and 600 C.E. During the classical era of China there were many cultural changes. The ideas of China changed due to the creation of three distinct religions: Confucianism‚ Legalism‚ and Daoism. Followers of Confucianism followed the ideas of Confucius; he believed that people should emphasize personal virtue‚ which included a respect of tradition. Because of those ideas
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SHORT COMMUNICATION Journal of Oral Health & Community Dentistry Inverted and Impacted Third Molar Ramesh Chandra1‚ Ambrish Kaushal2 ABSTRACT A case of unilateral impacted and inverted third molar has been reported. Its management should be performed in the conservative way to avoid conservative way to avoid serious consequences. Keywords: Inverted‚ Impacted‚ Third molar 1 Reader Department of Conservative Dentistry and Endodontics Career Post Graduate Institute of Dental Sciences‚ Lucknow 2 Senior
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Analytical Chemistry Experiment 2b: Determination of the ASA Content of Aspirin Due Date: September 16‚ 2013 Experiment#: 2b Title: Determination of the ASA Content of Aspirin Aim: To determine the Molar Concentration of NaOH and HCl acid used in their Standardization processes and to determine the acetylsalicylic acid (ASA) content in Aspirin. Materials/Apparatus: materials used are the same as that outlined in the laboratory procedure prepared by the laboratory instructor. Procedure:
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‘Explain how Jason van Genderen represents the concept of belonging in his short film ‘Mankind Is No Island’ Belonging is an abstract and dynamic concept which can be defined as that which belongs to one‚ that which pertains to one or that which is connected with a principle or greater thing. Jason van Genderen’s short film ‘Mankind Is No Island’ (2008) was shot entirely on a Nokia phone on the streets of the New York and Sydney. Van Genderen represents the notion of belonging/not belonging through
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