Avogadro constant

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    Physics Lab: RC Circuit Lab Emma Chen January 5, 2015 Team members: Alex Wang, Andy Val_ 1. Objectives The objective of this lab is to create an RC circuit that has a time constant of 10. 2. Method and Principle: The RC circuit that we created on the breadboard was a series circuit. RC circuits contain resistors and capacitors, and are connected to a voltage source. In our case, this voltage source was the battery. When we were measuring the voltage on the computer, we used a switch instead

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    Determining the Equivalent Mass and Dissociation Constant of an Unknown Weak Acid by Titrimetry Ka Chun Wong, and James Ross, Ph.D. East Los Angeles, Chemistry Department, 1301 Avenida Cesar Chavez, Monterey Park, CA 91754 Abstract Chemistry 102 is the study of kinetics – equilibrium constant. When it comes to the study of acid-base, equilibrium constant plays an important role that tells how much of the H+ ion will be released into the solution. In this lab, the method of titrimetry was performed

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    difference in mass, I will calculate percentage change in mass to account for any small differences in mass. Also a constant surface area of the diced steak is important, otherwise there would be a larger area for the solution to act on causing more tenderisation therefore altering the overall results. The temperature at which the meat is marinated at would need to remain constant. At a higher temperature, molecules are moving faster therefore osmosis is more likely to occur. The experiment will

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    Determination of An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96, and the pKa’s found experimentally were 2.0, 4.0, and 9.85. The accepted pKa values were found to be 2.10, 4.07, and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid, hydrochloride

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    “Chemical Kinetcs – The hydrolysis of PNA Ester” Introduction: Reaction of a compound with water can result in a splitting, or lysis, of the compound into two parts. Organic molecules containing a group of atoms called an ester can be hydrolyzed by water to form a –COOH group (carboxylic acid) and an HO-- group (alcohol) as follows: RCOOR’ + H2O ( RCOOH + HOR’ This reaction is spontaneous for almost all esters but can be very slow under typical conditions of temperature and pressure. The reaction

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    Abstract The topics of these experiments are both important processes known as identification and quantification. They were also used to review and introduce new lab methods such as titration and the Bradford assay. The identification was used to determine the identity of unknown amino acid #11 and the quantification was used to determine the concentration of unknown protein #11. The identity of amino acid #11 was found to be lysine, and the concentration of protein #11 was calculated to be 0.51

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    Storage of beverages ( Orange Juice and Coke )Stored at different temperatures affect their total acid concentration Subject: Chemistry Extended Experimental Investigation Context: Acid in beverages Student name: Tamana Hassanzada Table of Contents Hypothesis…………………………………………………………………………………………..…………………………….3 Aim…………………………………………………………………………………………………………………………………...3 Materials……………………………………………………………………………………………………………………………3 Procedure….……………………………………………………………………………………………….…………………………4

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    All three of the drugs being studied do to some degree affect fundamental processes within a ‘coagulation cascade’. If one of the in vivo processes is altered within the cascade the cycle cannot complete with the formation of Thrombin. [Figure 2] Warfarin is an antagonist of vitamin K used to treat reoccurrence of DVT and pulmonary embolisms. ‘Stenflo & Nelsestuen, 1974’ showed prothrombin ‘the precursor to thrombin’ to contain a number of glutamate residues relating

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    6.4.11 Method for Determining Leachability  Toxicity Characteristic Leaching Procedure (TCLP) Reference: USEPA Method 1311 • Apparatus: 1. Agitation apparatus: The agitation apparatus must be capable of rotating the extraction vessel in an end-over-end fashion at 30 ±2 rpm. 2. Extraction vessels: Jars or bottles with sufficient capacity to hold the sample and extraction fluid. Two liter normal capacity bottles are recommended. The vessel type is determined by the analysis of interest. 3.

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    PBL Write up: Acid-Base This document aims to explain the function of the acid-base equilibrium in place in the human body and to identify potential problems that may occur. Theses processes are tightly linked with the control of fluid levels in the body, this relationship and the function of the water homeostasis system will also be explored. The aim of this write up is to display a full understanding of the learning objectives developed in the PBL session. However by adhering to the original learning

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