Zinc oxide

+ O2 (g) 2MgO (s) + heat is exothermic and synthesis. Synthesis is also known as Direct combination. Direct combination is when reactions are made up of two or more reactants that form one product. Magnesium combined with Oxygen to form magnesium oxide. Before there were two elements and then they combined and from a more complex product. There is also only one product and two reactants. The combination of Magnesium and oxygen allows one to predict the outcome of a direct combination. Also, before

Observations Straight nail Nail corroded Bent nail Corrosion on both ends; no corrosion on bent part 5 Table 12.4. Effect of Metal Coupling on Iron nails V. Parameter Observations Iron nail with copper strip Nail corroded Iron nail with zinc strip No corrosion Discussion Metals have become one of the most in demand raw materials man has ever used. Cars, buildings, bridges, and such a like were built through this kind of resources which contributes to the progress and development of a

different methods of extraction. Now, the methods of extracting metal do not come cheap, nor does refining and purifying metal. Not only will you need special equipment for their extraction, but you will also need other elements as well such as copper, zinc, mercury, among others, for the purification and refinement processes. Some of these elements are very harmful and toxic not only to humans and animals but to nature as well, worsening the environmental impact of metal extraction. Aside from this

Redox reaction: Redox reactions involve transfer of electrons from one reactant to another Anode: The anode is the electrode which oxidation occurs Cathode: The cathode is the electrode at which reduction occurs Oxidation: Oxidation is loss of electrons Reduction: Reduction is gain of electrons Oxidation state: The oxidation state of an element is the charge on the ion Salt bridge: The salt bridge allows the migration of ions to occur Electrolyte: An electrolyte is a substance which in solution

Acidic Environment Oxides of non-metals which act as acids Non-metals burn in air or oxygen to produce acidic oxides. The addition of water to soluble oxides produces acidic solutions. Oxides of non-metals which act as acids include: * Carbon reacts with oxygen when burnt to form carbon dioxide which is acidic in nature. When dissolved in water, it becomes H2CO3 (carbonic acid). CO2 (g) + H2O (l) →H2CO3 (aq) * Sulfur burns in oxygen to

For many years now batteries have been our primary source of energy, acting as the driving force behind our business’, transportation and electronic devises, ensuring our day-to-day lives run smoothly. It is safe to say that they play a fundamental role in powering our 21st century lives, but have you ever stopped to wonder where this energy might come from, or just how batteries work? Alkaline batteries, in particular, have provided us with energy on the go for over two centuries, with the global

15 mL of 6.0 M sulfuric acid was added to the copper (II) oxide while stirring. The balanced equation for this reaction is as follows: CuO (s) + H2SO4 (aq) à CuSO4 (aq) + H2O (l) + SO2 (g) When the sulfuric acid was added to copper (II) oxide, the solution turned blue. This was due to the formation of aqueous copper (II) sulfate, which produced the copper ions to change the color of the solution. In the fifth reaction, 2.29 g of zinc was added to the copper (II) sulfate solution under the fume

specific binding between receptors on the gate surface and target analytes to an electrical signal for low-cost, rapid, and sensitive detection, for which signal acquisition and processing units can be simply integrated. Although silicon based metal oxide FETs (MOSFETs) (planar or nanowire) [45,46], carbon nanotube based FETs and graphene based FETs [47-49] have been widely studied as candidates for advanced biosensing applications, they are somewhat limited in various facets. In the first section

characteristics such as lightweight, flexible, low toxicity and good performance in diverse light conditions [2]. Usually DSSC’s consists of dye-adsorbed nanostructured metal oxide film serving as a photoanode, a Pt-coated counter electrode and liquid electrolyte injected between them [3]. Light irradiate on the nanostructured metal oxide film causes photo-excitation of the dye molecules by exciting electrons which are then injected into the conduction band of the semiconductor and fast transferred to the

simply put, is a mixture of rainwater and a few specific chemicals that are emitted both naturally and non-naturally. The process occurs in the lowest layer of the atmosphere, the troposphere. When compounds such as sulfuric dioxide(SO2) and nitrogen oxides(NO, NO2), are transported to this layer and react with the other parts of the troposphere(water, oxygen, carbon dioxide). Acid rain was first discovered in Sweden in 1872, but has been seen as a more prevalent problem in modern times. Although research