List of the entire famous scientist Alessandro Volta(1745-1827) An Italian Physicist who was a pioneer in the development of electricity. He created the first electric battery in 1800. This battery gave the world its first continuous‚ reliable source of electric current‚ and led to all important discoveries of the use of electricity. The unit of measuring electromotive force (emf)‚ Volt(v) is named after him. He also proposed the law that the air expands at a constant rate with increasing temperature
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Mass‚ Volume‚ Density‚ and Time Peter Jeschofnig‚ Ph.D. Version 42-0267-00-01 Lab RepoRt assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this
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ENZYMES LABORATORY REPORT Introduction The utilization of any complex molecule for energy by an organism is dependent on a process called hydrolysis. Hydrolysis breaks complex molecules into simpler molecules using water. Similarly‚ the process that is the reverse of this is called dehydration synthesis‚ which removes water from simpler molecules. However‚ because hydrolysis occurs very slowly‚ living organisms use biochemical’s called enzymes to speed up the reaction. In this lab exercise
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specific temperature to deliver or contain VERY PRECISE amounts of liquid. Examples of volumetric glassware that we will use include burets‚ pipets‚ and volumetric flasks. Ordinary glassware has less precise volume calibrations and are used whenever the volumes do not have to be measured as accurately. Examples include beakers‚ Erlenmeyer flasks‚ and graduated cylinders. Disposable glassware (or plastic ware) is used to transfer or hold liquids temporarily and may not contain any volume markings. Examples
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were prepared using 7mL of each different mobile phase (9:1‚ 8:2 and 7:3 pet ether: acetone solution). The TLC’s were performed and Rf values were measured. All materials were disposed of properly and all glassware was cleaned following correct laboratory
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fingers closest to the open end of the tube. B) Direct the flame of the burner into the open end of the test tube. C) Stopper the test tube with a rubber stopper. D) Wear goggles and a laboratory apron. 5. Base your answer on the diagram below and on your knowledge of biology. Which statement describes two unsafe laboratory practices represented in the diagram? A) The flame is too high and the test tube is opened. B) The opening of the test tube is pointed toward the student and the student is not wearing
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Experiment # 1 Date: 18/12/13 Title: Chemical Properties of Alkanes. Aim: To test the reactivity of alkanes using cyclohexane as an example. Apparatus/Materials: Cyclohexane‚ liquid alkane‚ aqueous bromine‚ test tubes‚ light source‚ watch glass‚ splint‚ 0.1 MKMnO4‚ concentrated H2SO4‚ dilute H2SO4. Method: Combustion: 1. A watch glass was placed on a benched protection sheet in a fume cupboard and the extractor in the fume on. 2. 4 drops of cyclohexane was placed on the watch glass using
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CHEMISTRY 1184 Laboratory Manual for GENERAL CHEMISTRY I Jim Carroll Roger Hoburg Dana Richter-Egger August 2006 University of Nebraska at Omaha i Table of Contents Table of Contents ......................................................................................................................................... i Chem1184 SYLLABUS............................................................................................................................... ii Preliminary
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LABORATORY REPORT I OBJECTIVES The objective of this experiment is to; • Identifying the range and limits of a measuring apparatus. • Rectifying any instrumental error that might be present in an instrument. • Investigating the limits and capabilities of a measuring instrument. • Determining the accuracy of the actual volume of a volumetric pipette‚ volumetric flask & measuring cylinder. INTRODUCTION The purpose of this experiment is to investigate the measurement of the actual volume
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of the sample. This technique of purification is only effective when there is a smaller amount of impurity in one substantial component. EXPERIMENTAL SECTION Material Impure adipic acid charcoal water Erlenmeyer flask filter paper Heat plate Filter flask 50ml & 250ml Beakers O ring & stand Graduated cylinder Pipette Ice Scoop Stemless funnel Vacuum filter (assembled) Spatula Boiling chips Scale Weighing paper Holding strap Hirsch funnel
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