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…

A. Nitric oxide is an odorless gas that plays an important role in the regulation of pulmonary vasomotor tone. As inhalation occur, NO is diffused from the endothelium into the smooth muscles of the pulmonary vessel and stimulates soluble guanylate cyclase which converts GTP to cGMP. An increase in cGMP relaxes the smooth muscles and produces vasolidatory effects which increase the blood flow to well-ventilated areas with elevated vasomotor tone. Beneficial effects of inhaled NO include decrease…

10 shows the  -T plots of the metal oxides (Co2O3, NiO and CuO) nanostructures. The data confirm that the materials have semiconductive features where the resistivity decreases dramatically as the temperature increases. However, there is a significant difference between the isothermal resistivity values of the oxides. To be specific, the room temperature resistivity of Co2O3, NiO, and CuO ( ρ_300^CoO,ρ_300^NiO and ρ_300^CuO)…

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…

“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…

In particular, selecting noble electrode materials is the hottest topics in the LIB field. Among them, bulk metal oxide such as Fe2O3, SnO2, ZnO, and In2O3 are promising material owing to their high theoretical capacity (~1000 mAh g-1), which considerable exceeds those of commercial graphitic anodes (372 mAh g-1).7–11 However, low electrical conductivity, huge…

Vascular anomalies are a serious medical condition that affect blood vessel formation in as many as 1 in 10 people (Richter and Suen 2015). Vascular anomalies can be divided into two broad categories: vascular tumors and vascular malformations (Richter and Suen 2015). Vascular tumors, also known as hemangiomas, are characterized by rapid growth with most undergoing involution once the patient has reached a certain age (Richter and Suen 2015). On the other hand, vascular malformations are…

The software activated full emissions controls during testing but reduces the effectiveness during regular driving. As a result, the cars emit nitrogen oxides at up to 40 times more than the allowable standard. The software enables cars to get better fuel economy at the cost of higher nitrogen oxide emissions (Boston et al., 2015). Volkswagen tried to sell their cars saying their cars had better performance and lower emissions but they did not mention the nitrogen emissions…