Worked Empirical Formula Chemistry Problem

The empirical formula of a chemical compound gives the ratio of elements, using subscripts to indicate the number of each atom. Its also known as the simplest formula. Here is how to find the empirical formula, with an example: Steps for Finding the Empirical Formula You can find the empirical formula of a compound using percent composition data. If you know the total molar mass of the compound, the molecular formula usually can be determined as well. The easiest way to find the formula is: Assume you have 100 g of the substance (makes the math easier because everything is a straight percent).Consider the amounts you are given as being in units of grams.Convert the grams to moles for each element.Find the smallest whole number ratio of moles for each element. Empirical Formula Problem Find the empirical formula for a compound consisting of 63% Mn and 37% O Solution for Finding the Empirical Formula Assuming 100 g of the compound, there would be 63 g Mn and 37 g OLook up the number of grams per mole for each element using the Periodic Table. There are 54.94 grams in each mole of manganese and 16.00 grams in a mole of oxygen.63 g Mn Ãâ€" (1 mol Mn)/(54.94 g Mn) 1.1 mol Mn37 g O Ãâ€" (1 mol O)/(16.00 g O) 2.3 mol O Find the smallest whole number ratio by dividing the number of moles of each element by the number of moles for the element present in the smallest molar amount. In this case, there is less Mn than O, so divide by the number of moles of Mn: 1.1 mol Mn/1.1 1 mol Mn2.3 mol O/1.1 2.1 mol O The best ratio is Mn:O of 1:2 and the formula is MnO2 The empirical formula is MnO2

How Small Companies Can Participate in Globalization Essay

Some small companies never thought about going global, or in other words, becoming international retailers. They think of selling their products in foreign countries and think of ways to do so. Before you know it, they have become global marketers. Many companies know that by doing business in other countries, they can broaden their potential buyers. By selling to foreign customers, though, retailers are stumbling upon roadblocks. Selling their product in international markets is not the same as selling in the United States. Retailers, especially small businesses with limited resources, are realizing large capital expenditures in order to accommodate sales in foreign markets. However, many companies are doing quite well in†¦show more content†¦Depending on what type of business you are in, you can find similar companies in other countries and form a partnership. This gives the seller more recognition in the foreign country. But, it is usually more costly due to the added expense of another office. By forming a partnership with a company that is in the country you want to do business in, the partner possibly has a list of contacts, already. This makes selling the product or service a lot easier. Still though, companies wanting to expand in foreign markets must be careful in choosing their partners. If they are not careful whom they choose as a partner, they could risk losing control of their product or service. And, they need to pay close attention to the day to day activities of selling. Some small businesses get too hasty because they want to expand their market and gross profit, so they make bad judgment calls when it comes to finding a company to form their joint venture with. The third method is by using a licensing agreement. Basically, the foreign company/business buys the rights to the American product. They become the licensees. 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Stoichiometry and Limiting Reagents free essay sample

The precipitate was filtered out of the remaining aqueous solution of stoichiometry. In our case, all four tests yielded more mass than should have occurred. Experimenters attribute this completely evaporated from the filtered precipitate, which would add excess mass. By dealing with such small quantities of reagents, any small inaccuracy in measurement creates a large difference in actual yield from theoretical yield. Through simple molar calculations, using the coefficients in the balanced chemical equation( CaCl2(aq) + 2NaOH(aq) Ca(OH)2 + CaCl2), the limiting reagent could be determined from the volumes of reactants used. The number two to four tests turned out as expected, NaOH and CaCl2 respectively being the limiting reagents. In the second test, according to our calculations, the products should have completely reacted, leaving pure water after filtration. In the test, the addition of NaOH to the filtered solution yielded more precipitate, which should not have occurred if the filtrate was pure water. We will write a custom essay sample on Stoichiometry and Limiting Reagents or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page We hypothesize that either the products were not measured in exact quantities, or in the test the products did not completely react with one another, leaving some CaCl2 in solution. In conclusion, by measuring reactants accurately, the products of a chemical reaction can be created to precise standards.