April 10‚ 2013 The Penny The use of pennies is steadily declining. Most people don’t even keep track of the amount of coins they have‚ so it’s more than likely that they’ll think it’s useless‚ and dispose of it. People would throw away the pennies they have‚ without a second glance. Bit if we all save up our loose change‚ there’s a chance we’d be able to save up to hundreds‚ or possibly even millions of pennies. Pennies are valuable to some people‚ for example‚ coin manufactures (Source
Premium Abraham Lincoln Money United States
TITLE: Determination of Riboflavin by using UV-Vis spectrophotometry. ABSTRACT: The amount of Riboflavin in various brand of children multivitamins was determine by using UV-Vis spectroscopy instrument‚ the series of standard of riboflavin was prepared in order to determine the amount of the riboflavin in the sample of children multivitamins. The maximum amount of riboflavin was found in the Champs multivitamin that contains 0.1155 mg followed by Chewies 0.1131 mg and Scott’s 0.0672 mg. OBJECTIVES:
Premium Acetic acid Vitamin Vitamins
Percent Composition of a Penny Background Information: Post-1983 pennies have a copper jacket and a zinc core. We hope to determine the percent composition of these two metals. This will be done by reacting the zinc with hydrochloric acid to form zinc ions in a single replacement reaction. The acid reacts with the zinc but not copper. The reaction of zinc metal with the hydrochloric acid (HCl) produces zinc chloride and hydrogen gas. Safety: Wear your safety goggles and apron If you spill Hydrochloric
Premium Hydrogen Hydrochloric acid Chlorine
Abstract: The purpose of this experiment was to determine the concentration of an unknown amount of copper sulfate using the spectronic 20. Four solutions of different concentrations of H₂O and CuSO₄ were put into the spectronic 20 to observe their absorption of light. Then‚ a graph was created to plot down the measurements. Using the calibration curve of the graph‚ the concentration of the unknown substance was found out to be .12M. Background/Introduction: Beer’s law (which states that
Premium Concentration Absorbance Sulfuric acid
pockets or purses for a few pennies? All they have is just unwanted weight to their pockets and purses. Few people now a days still bend down to pick up a penny off the sidewalk. Whether its the superstions of “luck” or just another penny to add into their collection. Only traditions explain our stubborn attachment to our pennies. However‚ pennies should not be abolished‚ they are beneficial to us in every days life. For example‚ people who have thousands of pennies saved up from over the years
Premium The Streets Luck Penny
Whether made in business‚ politics‚ science‚ or sports‚ most decisions are judged as either right or wrong‚ ethical or unethical. Regardless of what an individual believes about a particular action‚ if society judges it to be unethical or wrong‚ whether correctly or not‚ that judgment directly affects the organization’s ability to achieve its business goals. For this reason alone‚ it is important to understand business ethics and recognize ethical issues. social responsibility‚ an organization’s
Premium Ice cream Ethics Business ethics
CHEM 3281 Experiment Seven Determination Of The Composition Of A Multi-Component Mixture By Spectrophotometric Analysis Objectives: 1.Solid sample handling 2.The composition of a three-component mixture will be assayed by dissolution of the soluble components in water and measurement of their individual concentrations by visible spectrophotometry. Text Reference: Handbook of Instrumental Techniques for Analytical Chemistry‚ Frank Settle‚ editor. Prentice Hall‚ ‚ Upper Saddle River‚ NJ 1997‚ Ch 25
Premium Concentration Absorbance
EXPERIMENT : Iron in Breakfast Cereal by Atomic Absorption Spectroscopy OBJECTIVES : 1) To determine the actual iron content of different brands of cereals 2) To compare the experimental results with the values listed on the manufacturer’s labels. INTRODUCTION : Iron is one of the important minerals that is required for our bodies to function properly. Most of the iron in our body is found in the blood such as haemoglobin‚ approximately 60 -70% of the human body’s iron is found
Premium Analytical chemistry Breakfast Spectroscopy
Purpose The purpose of this experiment is to observe a redox reaction and understand what it means. We will observe the new bonds formed and the importance of the electron in the formation of these new bonds. Materials Boileezers (boiling chips) Desiccant 0.17M acetic acid (acidified water) Solution of Sodium thiosulfate Granular zinc Iodine crystals Zinc ion and iodine-iodide-triiodide ion in water Solid zinc iodide Mineral oil Silver nitrate Magnesium turnings 3M Hydrochloric acid (HCl) solution
Premium Iodine Electric charge Zinc
over the Benedict’s test method. The concentration of the coloured complex can be determined with the spectrophotometer at Absorbance 540.The sugar concentration of unknown sample can then be read off a calibration curve(standard curve) created using known sugar concentrations.The dilutions of a solution of known concentration are used to determine the concentration of unknown. Being familiar with the background information about reducing sugars and various methods used to identify them‚Biotechnology
Premium Water Boiling Sugar