Sean Dowling Julia Phaltankar Mrs. Oakes Chemistry w/ Algebra 10/G February 18‚ 2015 Determining Empirical Formula Lab Introduction: One can find an empirical formula by taking a sample of a compound and dividing the number of moles of one element in the compound by the number of moles of another element in the compound to form a small wholenumber formula. For example‚ in a sample of a made up compound of oxygen and lead‚ one mole of lead has a molar mass of 207.2 g/mole‚ and oxygen
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Roark’s Formulas for Stress and Strain WARREN C. YOUNG RICHARD G. BUDYNAS Seventh Edition McGraw-Hill New York Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto Cataloging-in-Publication Data is on file with the Library of Congress. Copyright # 2002‚ 1989 by the McGraw-Hill Companies‚ Inc. All rights reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act of 1976‚ no part
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Cost Formula Word Problem The cost formula for a manufacturer’s product is C = 5000 + 2 x ‚ where C is the cost (in dollars) and x is the number of units manufactured. (a) If no units are produced‚ what is the cost? (b) If the manufacturer produces 3000 units‚ what is the cost? (c) If the manufacturer has spent $16‚000 on production‚ how many units were manufactured? Answer these questions by substituting the numbers into the formula. (a) If no units are produced‚ then x = 0‚ and C = 5000 +
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What is post-natal care? Post natal care is when your midwife visits you at home after you have gone home after having your baby. Your midwife will ensure that mother and baby are doing fine. She will continue to visit you and your baby whenever necessary. Your doctor will also need to come and see you when your baby is five to seven days old to check that you are both recovering well from the birth. You will need to telephone the surgery to request a visit from your doctor because they can’t just
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Finding the formula of magnesium oxide Aims When magnesium is heated in air‚ it reacts with oxygen. During this oxidation reaction‚ magnesium oxide is produced. This increases the mass. If we know the mass of magnesium at the start‚ and the mass of magnesium oxide produced at the end‚ we can work out the mass of oxygen which has been combined with the magnesium. We can use these masses to work out the formula of magnesium oxide. Eye protection must be worn Apparatus Crucible and lid
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REVENUE ALLOCATION FORMULA IN NIGERIA INTRODUCTION Prior to the discovery of oil in Nigeria‚ other sectors of the economy thrived. Agriculture‚ for instance‚ was a major source of revenue for the Western Region. The Eastern Region that was less endowed devised other sources of revenue. All this has however changed since the discovery of oil in the country. This has led to the demise of the other productive sectors of the economy. In fact‚ Nigerians are poorer today than they were in the pre-oil boom
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Empirical Formula of Magnesium Oxide Date: Aim: The aim of this experiment was to determine the empirical formula of magnesium oxide. Equipment: · Balance · Crucible and lid · Bunsen burner · Magnesium ribbon (0.2g) · Steel wool · Crucible tongs · Pipe clay triangle · Tripod Procedure: 1. Obtain a clean‚ dry crucible and lid‚ then heat them for approximately 5 minutes over a Bunsen burner 2. Clean the surface of a 20 cm strip of magnesium ribbon using steel wool 3. Coil
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The Mean and Median: Measures of Central Tendency The Mean and the Median The difference between the mean and median can be illustrated with an example. Suppose we draw a sample of five women and measure their weights. They weigh 100 pounds‚ 100 pounds‚ 130 pounds‚ 140 pounds‚ and 150 pounds. To find the median‚ we arrange the observations in order from smallest to largest value. If there is an odd number of observations‚ the median is the middle value. If there is an even number of observations
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correct formula for the following binary ionic compounds. (a) Lithium fluoride LiF (b) Calcium oxide CaO (c) Aluminum nitride AlN (d) Beryllium chloride BeCl2 (e) Potassium iodide KI (f) Aluminum oxide Al2O3 23. Write the correct formula for the following binary molecular compounds. (a) Carbon monoxide CO (b) Boron tribromide BBr3 (c) Sulfur hexafluoride SF6 (d) Carbon dioxide CO2 (e) Carbon tetrabromide CBr4 (f) Nitrogen dioxide NO2 24. Write the correct formulas for
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DETERMINATION OF EMPIRICAL FORMULA OF MAGNESIUM OXIDE Objective: The objective of this lab is to experimentally determine the empirical formula of Magnesium Oxide. Equipment: • Ring Stand • 5 inch ring • wire gauze • Crucible and Crucible lid • Butane burner • Magnesium • Crucible tongs • Safety glasses • Gloves Experimental Procedure 1. Setup ring stand with five inch ring and triangle. 2. Obtain desired amount of Magnesium‚ a crucible with
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