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Determining the Molar Mass of an Unidentified Volatile Liquid Abstract Molar mass helps to determine how much of a substance is present in a sample. Volatile liquids change from liquid to gas at relatively low temperatures and atmospheric pressures. In this investigation an unknown volatile liquid is vaporized so that the ideal gas law can be used to determine its molar mass. This study will apply the ideal gas law in tandem with the concept of volatile liquids and basic molar mass related stoichiometry
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People tend to think that the recovery from post psychotic depression that usually comes as a result of some kind of psychosis should be long and tiring. This case shouldn’t be the usual case. If people strict to go through the next 5 stages of recovery‚ they can assure themselves an easier and shorter way recovery from a post psychotic depression:1) Getting out of bed One of the most common characteristic of people who suffer from post psychotic depression is the unwillingness to get out of bed. If
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Hess Law Lab DESIGN Aspect 1: Problem: What is the molar enthalpy of formation of magnesium oxide? Variables: Manipulated: None Responding: None Controlled: Isolation of calorimeter‚ concentrations of substances involved. Aspect 2: Background Information: Assumptions: Specific heat capacity of water‚ we assume that the acid has the same qualities as water including heat capacity‚ and we assume the enthalpy of formation for magnesium oxide from the data booklet for theoretical
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Former Massachusetts State Crime Lab chemist‚ Annie Dookhan‚ has been indicted on twenty-seven counts of tampering with evidence‚ perjury‚ and obstruction of justice after a legal fallout that has jeopardized thousands of drug cases (Smith). Dookhan admitted to “dry-labbing” (distinguishing a sample is a narcotic based on appearance instead of actually testing)‚ altering test results‚ and “deliberately turned a negative sample into a positive for narcotics a few times”. Another way in which she tampered
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repCHEMISTRY I - LABORATORY EXERCISE MANUAL LABORATORY EXERCISE 10: Melting Point and Boiling Point Determination This is a traditional lab. You’ll simply follow the step-by-step procedure‚ keeping records of your measurements and observations. Each student will write their own lab report‚ which should include the following: Name: Names of lab partners: Date of Experiment: Date Report Submitted TITLE: Purpose: A brief statement about what the experiment is designed to determine
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Chem 31.1 Post Lab 3 CARBONYL COMPOUNDS AND CARBOHYDRATES HYDROLYSIS OF POLYSACCHARIDES - - Susceptible to both nucleophiles and electrophiles Presence of C=O TEST FOR ALDEHYDES AND KETONES - - Reaction with 2‚4-DNP (Dinitrophenylhydrazine) Positive: Formation of yellow precipitate IODOFORM TEST - Carbonyl compounds: Methyl ketones will give a positive result Postive: Yellow precipitate (CHI3) MOLISCH’S TEST for carbohydrates - TOLLEN’S TEST – for aldehydes
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larity------------------------------------------------- Names: Benjamin Fischmann ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- What is the Molar Concentration (Solute concentration) of a Potato? ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- Design -------------------------------------------------
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Investigation between mass and acceleration Stage 1 - Planning Title: Investigating acceleration – How does changing the mass of an object change its acceleration? Introduction: As the speed of moving object and rate‚ the forces acting on the object‚ the mass of the object‚ and gravitational force of it might affect the acceleration‚ I will investigate about the mass of the object. Aim: I will try to answer the question “How does changing the mass of an object change its acceleration?” which
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Chapter 3 Important Chemical Concepts: Expressing Quantities and Concetrations I. Important Units of Measurement A. SI Units (International System of Units) SI Base Units Physical Quantity Name of Unit Abbreviation Mass kilogram kg Length meter m Time second s Temperature kelvin K Amount of substance mole mol Electric Current ampere A Luminous Intensity candela cd Prefixes for Units giga- G 109 mega- M 106 kilo- k 103 deci-
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