Determining the Percent Oxygen in the Air INTRODUCTION: Recent tragedies in coal mines have exemplified the importance for us humans to breathe an adequate amount of oxygen if we are to survive. But what amount of oxygen is adequate? How can we know the amount of oxygen present in what we consider fresh air? The purpose of this experiment was to determine the percent oxygen typically present in air. The conclusion of the test suggested that the concentration of oxygen in the lab at the time of
Premium
- Dell profit falls 47 percent - The major key issues for Dell profit falls 47 percent in third quarter is due to Dell’s desktop computers and laptop sales dropped significantly‚ it is because of tablet and Smartphone being popularly‚ mobile devices using mobile operating system from Apple and Google. For the PC market‚ the main competitive products-Smartphone and tablet are raising the demand fastly so it led to a drop in demand of Desktop and laptop. To facing the market needs are changing
Premium Personal computer Laptop Marketing
Experiment 5: Percent Water in a Hydrated Salt Chemistry 1300 Instructor: 2/8/12 Abstract: The purpose of this experiment was to determine the percent by mass in a hydrated salt‚ as well as to learn to handle laboratory apparatus without touching it. The hydrated salt‚ calcium carbonate‚ was heated with high temperature to release water molecules. Gravimetric analysis was used in this experiment to determine the percent by mass of water in a hydrated salt. The hypothesis of this experiment
Premium Water Chemistry Molecule
1. A student neglected to add sodium carbonate when extracting the tea leaves with hot water. Yet a very high yield of caffeine was obtained. The crystals melted at 202-214°C. Explain. • The sodium carbonate is supposed to be added when extracting the tea leaves with hot water in order to help purify the caffeine. So since the student neglected to add sodium carbonate the caffeine won’t be pure but the student would still be able to recover a large amount of caffeine. The literature melting point
Premium Chemistry Water Tea
Elizabeth Obuya MBA 651 HR Case Study: How about a 900 Percent raise? 1. Recruiting nurses abroad can be mutually beneficial or a disadvantage to both the U.S and the foreign country. Hiring ready to deploy and fully qualified nurses can help to temporarily bridge the nursing shortage until the government is assured the situation is in a better control. Also‚ according to Karen B. Haller‚ Vice President for Nursing and Patient Care Services at the Johns Hopkins Hospital‚ foreign recruitment creates
Premium Nursing Nurse
Analysis Group Date: December 2009 Group members: Jun Gao Jiaqi Yin Qing Zhang Antoine Vulcain Main issues: Evaluation of two possible products: 1. NPV of two possible products 2. WACC analysis --CPAM --Bond yield plus Recommendation: Product B(aircraft) will be suggested due to the situation of the company. ---If there are enough funds for the company‚ product A is also acceptable Analysis Summary: High Mountain as an technology
Premium Weighted average cost of capital
Lab 5 The Diffraction Grating Chinua McDonald Objective: To measure the wavelength of light with a diffraction grating. Theory: The two types of diffraction gratings are the transmission and reflection gratings. They are made by ruling on a piece of glass or metal a number of evenly spaced lines with a fine diamond point. Diffraction phenomena can be analyzed in terms of Huygens’ principle‚ according to which every point on the wave front of a wave should be considered as a source
Premium Light Diffraction Wavelength
Limiting Reagents and Percentage Yield Worksheet 1. Consider the reaction I2O5(g) + 5 CO(g) -------> 5 CO2(g) + I2(g) a) 80.0 grams of iodine(V) oxide‚ I2O5‚ reacts with 28.0 grams of carbon monoxide‚ CO. Determine the mass of iodine I2‚ which could be produced? 80 g I2O5 1 mol I2O5 1 mol I2 1 333.8 g I2O5 1 mol I2O5 28 g CO 1 mol CO 1 mol I2 253.8 g I2 1 28 g CO 5 mol CO 1 mol I2 b) If‚ in the above situation‚ only 0.160 moles‚ of iodine‚ I2 was produced
Premium Stoichiometry Oxygen Zinc
and the sustainable yield challenge Author for correspondence: Angela Karp Tel: +44 (0)1582 763133 Fax: +44 (0)1582 760981 Email: angela.karp@bbsrc.ac.uk Received: 21 November 2007 Accepted: 4 February 2008 Angela Karp and Ian Shield Centre for Bioenergy and Climate Change‚ Plant and Invertebrate Ecology Department‚ Rothamsted Research‚ Harpenden‚ Hertfordshire AL5 2JQ‚ UK Contents Summary I. II. III. IV. Introduction Bioenergy‚ biomass and biofuel crops Bioenergy yield traits Bioenergy composition
Premium Wheat Biofuel
Solvent/Water Trap Diagram Rodney Atwaters Halle Bair May 28‚ 2013 Chemistry 36100 Introduction The purpose of this lab was to produce benzoic acid by mixing sodium benzoate with hydrochloric acid. The Hydrochloric acid used in the experiment was a stock solution made by mixing HCl Acid and deionized water. HCl acid‚ historically called‚ muriatic acid or spirits of salt‚ hydrochloric acid is produced from sulfuric acid and common salt‚ NaCl (Princeton.edu). Since the early 1900 ’s‚ sodium
Premium Hydrochloric acid Chlorine Chemistry