...Limiting Reactant (Experiment #8) CHM 1045L Lucy Garcia Misturah Abdulkareem, Alexander Gonzalez, Oluseun Fajimolu Dr. Abuzar Kabir Purpose/Abstract The purpose of this lab was to determine the limiting reactant in a mixture of to soluble salts and the percent composition of each substance in a salt mixture. Procedure/Method First, we were to measure and record the mass of a beaker, then transfer about 1 gram of the salt mixture into the beaker, measure, and record the combined mass. Then, we had to fill a 400-ml beaker with deionized water and test it to make sure that the ph was just basic. We then combined the deionized water and salt by adding about 150ml of the deionized water to the salt mixture. We then stirred the combined mixture for about 2-3 minutes and then let it sit so that the precipitate would settle. After it settled, we covered the beaker with a watch glass and warmed it up on a hot plate at 75C for about 15 minutes, periodically stirring the solution. After 15 minutes, we removed the beaker from the heat and allowed the precipitate to settle again. While we waited for the precipitate to settle, we prepared wash water by heating up about 30 ml of deionized water at 70-80C. We then placed filter paper in a filter funnel to set up gravity for filtering. On the side, we took some of the solution’s supernatant and half-filled two test tubes using a pipet. Thereafter, we took the rest of the solution started...
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...NO(g) + H2O(g) (b) GaBr3(aq) + Na2SO3(aq) → Ga2(SO3)3(aq) + NaBr(aq) 2. Ethanol, C2H5OH, is a liquid with a density of 0.789 g ml-1 at 25 °C. Calculate the molarity of ethanol solution made by dissolving 20.00 mL of ethanol at 25 °C in enough water to make 250.0 ml of solution. [Ans: 1.37 mol L-1] 3. Copper sulfate is widely used as a dietary supplement for animal feed. A lab technician prepares a “stock” solution of CuSO4 by dissolving 79.80 g of CuSO4 in enough water to make 500.0 mL of solution. (a) Determine the molarity of the CuSO4 “stock” solution prepared by the technician. [Ans: 1 mol L-1] (b) Calculate the volume of CuSO4 “stock” solution that should be diluted to give 2.5 L of [Ans: 0.25 L] 0.1 M CuSO4. 4. Aluminum is a limiting reactant in the reaction with sulfur gas to form aluminum sulfide. Initially, 1.18 mol of aluminum and 2.25 mol of sulfur are combined. 2Al(s) + 3S(s) → Al2S3(s) (a) Calculate the aluminum sulfide formed in moles. (b) Calculate the mass of the excess reactant after the reaction. [Ans: 0.59 mol] [Ans: 15.39 g] [December 2013] 1 5. A mixture of excess carbon disulphide, CS2, and 650 cm3 of 9.2 g dm-3 chlorine, Cl2, are passed through a hot reaction tube to form tetrachloromethane, CCl4, as below: CS2(l)...
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...Deciding on the right piece of equipment? By: Maurice T. Wade Student: American Intercontinental University Class: ENG106 Abstract Trying to set out and find the perfect computer for the members of my organization there are several factor that are vitally important. These are factors are but not limited to memory, anti-virus protection, and processing speed. So the best choice of all three of these in one would be a MAC from Apple. This would be the recommendation that I would give. The search has been narrowed down between three units which are Apple IMac 27inch (Late 2012), Dell XPS 27 Touch All in One (2720), last but not least Dell Optiplex 9010 AIO. Trying to set out and find the perfect computer for the members of my organization there are several factor that are vitally important. These are factors are but not limited to memory, RAM size, and processing speed. So the best choice of all three of these in one would be a MAC from Apple. This would be the recommendation that I would give. The search has been narrowed down between three units which are Apple IMac 27inch (Late 2012), Dell XPS 27 Touch All in One (2720), last but not least Dell Optiplex 9010 AIO. So for memory the Dell XPS takes this category by a land slide it comes off the shelf with 2038GB worth of memory. That is an extremely large amount of memory that could definitely come in handy depending on the reason that the organization plans on using the computers. With Apple IMac you are only getting...
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...During the past few years Target has focused on its microenvironmental factors. They have claimed to have focused on 4 primary causes to the overall factor of the company. First off when you talk about Target you also have to mention their greatest competitor which is Walmart. So, the first stage of these factors is Competitors. The main and well known strategy that they use is very low prices that are resonated with the consumer. This all started when the economy took a plunge into recession and consumers were trying to savor every penny they had in pocket. This led to a decline in market share for target because Walmart then has the largest microenvironment as a competitor with a low costing store. Next on the list of factors is the customers that buy from these stores. As mentioned in the beginning as the recession started customers started relying more on coupons and other ways to save a dollar. This was so wide spread over the U.S. because unemployment rates rose to their all-time highs. Target is very well-known for their style and having slightly higher prices than Walmart for the “better quality” that a customer didn’t have a problem paying before the recession. Overall this idea of being fashionable and spending a few extra dollars on merchandise led to a decrease in customers for Target because they were not being cost savvy for the average customer. If they had done a better job in fulfilling customer satisfaction than Walmart did then they could have had the higher...
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...Purchase here http://homeworkgoods.com/math-117-entire-class Product Description Week 1 week 1 (x y)3 = x y3.doc week 1 3 exponent rules.doc week 1 dividing by a binomial.doc week 1 dividing by a monomial.doc week 1 evaluate a polynomial.doc week 1 the sign of the base.doc Week 2 math 117 week2- determine the difference of two squares.doc Week 3 week 3 factoring solve quadratic.doc week 3 find the GCF.doc week 3 How is doing operations.doc week 3 Least common denominators.doc week 3 not in factored form.doc week 3 number game.doc week 3 process of canceling like factors.doc week 3 understand exponent rules when multiplying rational.doc week 3 what are rational expressions.doc week 3 zero-factor property.doc Week 4 week 4 cancel factors not terms.doc week 4 necessary to perform a check.doc week 4 undefined value for 1(x ¿C 4).doc Week 5 week 5 first step to solve rational equation.doc week 5 describe two exponent laws.doc week 5 first condition for a simplified radical.doc week 5 index of a radical.doc week 5 true or false 28 ¿C 4í¦2.doc week 5 true or false for 2 radical statements.doc week 5 true or false for 2 statements.doc week 5 what are radical expressions.doc week 5 what must be true about the radicand and the index.doc week 5 why to check your answer.doc week 5 Why to simplify radical expressions.doc Week 6 Week 6 Concept Check Pythagorean Theorem.doc Week 7 week 7 how to complete the square.doc week 7 how to use...
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...1. Review the list of factors that may contribute to building positive brand equity (list one). Which factors do you think would be the main contributors to a firm’s brand equity? 1. Product range 2. Relative product quality 3. Word-of-mouth 4. Social ‘status’ of the product 5. Visibility of the product 6. Market share (extent of popularity) 7. Success of new products 8. Target markets 9. Competitive set 2. Now review the second list of brand equity benefits. Which ones do you consider to be the main benefits? 1. Increased sales 2. Price premium 3. Customer loyalty 4. Perceived popularity and real visibility 5. Point-of-sale merchandise uptake 6. Supplier bargaining power 7. New product success 8. More product line extensions 9. Significant competitive advantage 10. Point-of-sale merchandise uptake 11. Easier market development 12. Stable cash flow and easier planning 3. Looking at the two lists, do you think that there is a relationship between the two? That is, does a strength/performance in one list contribute to a better result for a similar factor in the other list? (Example, a strong brand can be built by social media, yet strong brands will generally have a greater social media presence and uptake.) Yes, I imagine that there is a relationship between the two records. According to my perspective I surmise that is does quality in one rundown add to a superior result for a comparable...
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...Employers to Achieve Equal Pay An Easy Read Guide is also available as a quick reference for all users including employers of small business and employees in general. The publications are available at the EOC website. Should you require clarifications on these publications or obtain the hard copies, please contact the Equal Opportunities Commission. Enquiries Fax Email Website : 2511-8211 : 2511-8142 : eoc@eoc.org.hk : www.eoc.org.hk AN ILLUSTRATION ON DEVELOPING AN ANALYTICAL JOB EVALUATION SYSTEM FREE OF SEX BIAS TABLE OF CONTENTS Page Introduction Part 1 Part 2 Part 3 Part 4 Analytical Job Evaluation Selection of Factors for Job Comparison Defining Factor Levels Developing a Scoring System Job Evaluation Template Part 5 Appendix 1 Appendix 2 Introducing a Gender-neutral Job Evaluation System Job Description Template Sample Factor Level Definitions 1 2 7 12 15 19 20 24 25 INTRODUCTION This is a supplementary book to the “Guide to Employers on Equal Pay between Men & Women”. The purpose is to illustrate the mechanism of an analytical job evaluation system that is free of sex bias. The tool presented is not intended to be a prescribed job evaluation methodology for compliance with...
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...chool of Information Technology 1. (30 points) The following formula describes a large company’s number of viruses, V, on employee computers. The variable, t, is time, in years, since 2002. Answer the following questions showing all of your work. = 5√ + 12 a. How many viruses were reported in 2003 ( = 1)? b. How many viruses were reported in 2006 ( = 4)? c. How many viruses were reported in 2038 ( = 36)? d. Using the information on number of viruses reported in the year 2003, 2006, and 2038, describe the company’s increase in viruses on employee computers since 2002. 2. (25 points) Write a prime trinomial and state why it cannot be factored. 3. (25 points) Pick three random numbers and find the greatest common factor of all three. 4. (20 points) Write the formula of the trinomial factoring and provide one example. School of Drafting and Design 1. (30 points) The following formula describes the penalty fee, F, in thousands of dollars, a company has to pay if the building project is not completed by the deadline. The variable, t, is time, in days, past the deadline. Answer the following questions showing all of your work. = 6√ + 80 a. What is the fee if the project is completed 1 day after the deadline ( = 1)? b. What is the fee if the project is completed 4 days after the deadline ( = 4)? c. What is the fee if the project is completed 49 day after the deadline ( = 49)? d. Using the information on project completion, describe the fee increase if the company...
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...traditional domed (выпуклые) trunks, established his reputation as a master luggage-maker. Vuitton began covering his trunks in grey canvas, which was both elegant and waterproof. After a huge success LV started to make shoes, watches, jewelry, accessories, sunglasses and books. (2nd slide) Political factors The global luxury goods market can be separated into America, Europe, Japan, Asia-Pacific, and rest of countries by region. Overall, the major luxury goods consumption countries have relatively stable political environment in recent years. However, in southern Europe, the governments’ financial turmoil and austerity measures indicated an underlying weakening demand of luxury goods for local people. But the gap was filled by travelers from other countries. The import duty policy in different countries is another factor should be considered in the industry. The high import duty will be part reason of high price differences between different countries. Consequently, the grey market can be formed in the countries which have high price differences. (3 slides) Economical factors The major stores of LV are based in Europe, so the euro exchange rate will be an important factor to...
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...By: Sanabil Sajid Submitted To: Mr. Triantafillou Room: 211 Class: SNC2D3-04 Due Date: 08/01/2016 By: Sanabil Sajid Submitted To: Mr. Triantafillou Room: 211 Class: SNC2D3-04 Due Date: 08/01/2016 CONCAVE MIRRORS CONCAVE MIRRORS __________________ __________________ How does the distance of the object from a concave mirror affect the size and orientation of the image? 1) COVER PAGE • Use blank paper (not lined) • Put the Lab or Investigation Number in the center of the page and underline it • Put the Title of the Lab underneath it with CAPITALIZED LETTERS and underline it • Put your Name, Teacher’s Name, Your Class, and Due Date on the bottom right corner of the cover page • Put a list of your Group Members (not including yourself) on the bottom left corner of the cover page • No pictures or drawings should be on the cover page (front or back) 2) LAB WRITE-UP • If typed, use blank paper (not lined); if written, use lined paper • Put the Lab or Investigation Number on the top left of the first page and underline it • Put the Title of the Lab on the top middle of the first page, CAPITALIZED, and underline it • The lab write-up should be printed, handwritten or typed neatly • Must include ALL of the following headings (which are underlined) Problem: (Purpose / Question) • Write down the purpose of the lab; what you are trying to determine • This should be done in one sentence • Can be written as a question • Sometimes...
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...consumer wealth, and people’s propensity to consume but ignores “the costs and risks of doing business in the market.” These costs are grouped into a category classified as “distance” which itself is sub-divided into four dimensions: cultural distance, administrative distance, geographic distance, and economic distance [CAGE]. Ghemawat proceeds to list factors that influence distance and industries that are affected by the specific dimension. These results are framed in an artificially created schematic: the CAGE Distance Framework. Important attributes contributing towards cultural distance include different languages, different ethnicities, different religions, and different social norms. Important attributes contributing towards administrative distance include absence of colonial ties, absence of shared monetary or political association, political hostility, government policies, and institutional weakness. Factors toward geographic distance include physical remoteness, lack of a common border, lack of sea or river access, size of country, weak transportation or communication links, and differences in climate. Factors towards economic distance include...
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...Cost of Short-Term Financing 1) Commercial Paper The EPG Mfg. Co. uses commercial paper regularly to support its needs for short-term financing. The firm plans to sell $100 million in 270-day maturity paper on which it expects to have to pay discounted interest at a rate of 12 percent per annum. In addition, EPG expects to incur a cost of approximately $100,000 in dealer placement fees and other expenses of issuing the paper. The effective cost of credit to EPG can be calculated as follows: APR = [($9,000,000 + $100,000)/($100,000,000 - $100,000 - $9,000,000)] * [1/(270/360)] = 13.35% 2) Accounts Receivable Loans The AB Co. sells electrical supplies to building contractors on terms of net 60. The firm’s average monthly sales are $100,000; thus given the firm’s 2 month credit terms, its average receivables balance is $200,000. The firm pledges all its receivables to a local bank, which in turn advances up to 70% of the face value of the receivables at 3% over prime and with a 1% processing charge on all receivables pledged. AB follows a practice of borrowing the maximum amount possible, and the current prime rate is 10%. The APR of using this source of financing for a full year is computed as follows: APR = [($18,200 + $12,000)/$140,000]*[1/(360/360)] = 21.57% 3) Factoring Accounts Receivable $100,000 receivable is factored, carrying 60-day credit terms, a 2% factors’s fee, a 6% reserve and interest at 1% per month on advances...
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...needs are needed at the same time as well as conflicting needs. Frederick Herzberg developed a theory on motivation during the midst of the 20th century which is most commonly known as the "dual factor theory". This is generally used when investigating motivation in organisations. His study was based on a survey of a study of 203 people across the 2 professional groups of engineers and accountants at Pittsburgh University, where they were asked to recall times over the previous year when they felt "exceptionally good" and "exceptionally bad" and their explanation for each case. From this study he identified two distinct list of factors that altered their motivation. These lists were a set of factors which cause satisfaction and dissatisfaction with both lists being mutually exclusive. The factors of satisfiers or Motivators, which are understood to yield a real sense of motivation in employees, are ordered in a list increasing in frequency beginning with a sense of personal achievement and growth, feelings of responsibility, intrinsically interesting work, feelings of recognition because the work is important and ending with a sense of achievement. These factors are all intrinsic to the individual and to do with job content. The opposite factors are known as dissatisfiers or hygiene factors. These will not motivate people in an organisation but are necessary within the...
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...ourselves in textbooks and piles of notes is what most of us resorts to do. However, an imperative questions should be asked ; does strenuous and long hours of studying truly guarantees the distinctions that we need and ultimately success in our life? Or otherwise, there are many other factors that contribute in determining the academic success as a student? First and foremost, it is an undeniable fact that one needs to study and do work conscientiously to improve on one's results. However, getting distinctions can not simply be achieved through long hours of staring at diagrams or regurgitating lines from textbooks. One needs to fully contemplate the subject in hand before one is able to answer questions regarding the matter. As a high-school student, the challenge that emerges would be to understand abundant materials within a short period of time before the examination. Therefore, the requisite skill is to be able to select important points and elaborate on it. Making mind maps and doing research from external sources may prove to be helpful in helping one to have profound understanding of the subject. Thus, innovative ways of studying is a factor that contribute to academic success. Another factor which is often dismissed as unimportant would be parental support. Although in today's generation, high-school students no longer depends on their parents to ask for academic guidance, parents must still play an active role in doing whatever means necessary to provide moral as well...
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...expressions and trigonemtirc identities. GCF Factoring The greatest common factor of two numbers (x and y) is defined as the largest factor that can be evenly divided into each number (x and y). Example 1: Find the GCF of the numbers 20 and 50. Solution: The factors of 20 are 1, 2, 4, 5, 10, 20. Because 1 x 20 = 20; 2 x 10 = 20; 4 x 5 = 20 The factors of 50 are 1, 2, 5, 10, 25, 50. Because 1 x 50 = 50; 2 x 25 = 50; 5 x 10 = 50 Therefore, 10 is the largest factor that is common to both 20 and 50, therefore it is the GCF. Example 2: Find the GCF of the terms 9x10y8z9 and 12x9y8z10 and 18x8y9 Solution: The factors of 9x10y8z9 are 1, 3, 9, x10, y8, z9 The factors of 12x9y8z10 are 1, 2, 3, 4, 6, 12, x9, y8, z10 The factors of 18x8y9 are 1, 2, 3, 6, 9, 18, x8, y9 Therefore, the GCF is 3x8y8. GCF factoring is a method where you find the GCF of all your terms and factor it out of the brackets (divide each term by the GCF). Example 3: Factor [pic] Solution: Example 4: Factor [pic] Solution: Example 5: Factor [pic] Solution: Example 6: Factor [pic] Solution: Example 7: Factor [pic] Solution: Factoring: greatest common factor (gcf) Factor the following expressions by using the greatest common factor. |–5x3 + 6x |12x3 + 4x2...
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