Indium tin oxide

1. The reported mole ratio of magnesium to oxygen will be too high. The experiment will have less oxidation while burning. Since there are 2 oxygen and some of the magnesium evaporates as it burns, the ratio will be higher than usual 2. Since there are some magnesium present at the end of the result from not allowing all of magnesium to react and oxidize, the ratio of Mg:O will be too high -Source of error: The first source of error happened when students lifted the lid off, sometimes he/she…

Johan Gottlieb Gahn, a swedish chemist, heated the mineral pyrolusite (MnO2) and in the presence of charcoal, found element 25, manganese in the year 1774. This silvery-metallic element has an atomic mass of 54.938049 rounded to 55 with 7 valence electrons. Manganese is a transition metal in group 7, period 4. Manganese is very flammable and dangerous with very strong intensity! It’s found in the earth’s mantle while having a melting point of 1246℉. The element manganese stimulates functions of…

Abstract: In this lab our main objective is to find the empirical formula of MgO, magnesium oxide. To do this first we have to make sure when we burn Mg in the crucible and it reacts to with O. This lab experiment Mg is complicated by another factor. Mg is so reactive that it reacts with N in the air so some of the Mg which is suppose to react with O will react will N instead. This obstacle can be overcome by simply adding water to the Mg3N2 to yield MgOH2 and NH3. This will undo the reaction so…

According to the American Kennel Club, the German Shepherd is an “all-purpose” service dog. They are generally large in size, swift, intelligent, and powerful. The ancestry of the German Shepherd, much like that of many canines, was originated from “herding and farm dogs.” The association of the German Shepherd to man was comradeship and service. German Shepherds are known for their “loyalty, courage, and ability to assimilate…” The successful training of this canine should yield well-ordered…

“Magnesium was discovered by Sir Humphrey Davy in England (1755). Sir Humphrey Davy also discovered MgO and HgO. The original name of Magnesium is Magnesia from the Greek word. In 1618, a farmer at Epsom in England gave his cows water from a well, but the cows refused to drink because of the water’s bitter taste. However, the farmer noticed the water seemed to heal scratches and rashes. The words spread out. Eventually it was recognised to be magnesium sulphate, MgSO4. Until 1755, it recognized…

The aim of this experiment was to determine the percentage composition of magnesium and oxygen in magnesium oxide and evaluate if the composition varies or remains constant. To test this, magnesium was heated and made to react with the oxygen gas in the atmosphere. This reaction formed the ionic compound, magnesium oxide. The percentage composition was later calculated based on the results of the experiment as shown in the above calculations, Figure 4. These results were compared to the expected…

Some issues regarding emissions include the Volkswagen Scandal which involved the German company activating emission controls to meet laboratory test standards with nitrogen oxides, but in real driving emit up to 40x more; test manipulation is a growing problem in the world today (EPUK 1). As a result of test manipulation, millions of vehicles on the roads in the US and all over the world are operating without properly certified…

Mr Hart directed him to his small room and what he found solved the case. In the janitor’s desk there was a drawer with tin foil, empty sparkler boxes and a receipt showing he had bought all this which was what the bomb was made out of. However Ross didn't believe it was the janitor so checked the tin foil and boxes for any fingerprints and found some. The fingerprints on the tin foil matched a 2 different student which mean this was because of 2…

and having a clear mission they are able to overcome their rejection. Dorothy and Jia Jiang wife lifts Jia Jiang and the scarecrow up when their insecurities are too much to handle. The lion and Jia Jiang use overcoming fear to self-improve and the Tin Woodman and Jia Jaing use a clear mission to overcome their rejection. In all these examples everyone uses a different way to overcome rejection. If you overcome rejection then you can overcome…

Although Dorothy is not the typical heroin, since she is a young girl stranded in a foreign land, I believe that she is the heroin in The Wizard of Oz. Throughout her journey, Dorothy shows courage and sensitivity and in the process, manages to touch and change other characters’ lives for the better. Upon landing in Oz after the cyclone, Dorothy managed to kill the Wicked Witch who was clearly affecting the lives of others in a negative way. The munchkins were thankful and happy that…