Chemical Essay Examples

chemical oxygen demand of wastewater. Q3. What are Chemical oxygen demand and its importance? Chemical oxygen demand refers to the amount of oxygen that is consumed by chemical reactions or compounds in a specific solution. COD is expressed as the mass of oxygen consumed (in milligrams) per unit volume of the solution (in liters). In an activated sludge process or in aquatic bodies the soluble particulates and organic wastes consume oxygen for biodegradation. On the contrary, microorganisms present in bioreactors or wastewater also consumes oxygen for their metabolic activities. This component is referred to the BOD (biological oxygen demand) of the solution. Together, COD and BOD are referred as...

chemical, genetics and psychological factor. Studies indicate that depressive illness is brain disorders. The new technologies such as brain imaging show that the brain of people suffering from depression looks different from the brain of people who are not depressed (Fox, & Raichle, 2007). The brain part that is responsible for regulating thinking, sleep, mood, behaviors as well as appetites appear to function aberrantly. There are other types of depressive disorder that run in families such are linked to genetic factors. This does not mean that depression cannot occur in people without families’ histories of this disorder. Genetics studies show that the risk of contracting depression may be...

Chemical weapons are also used through direct contact delivered by missiles to targeted people. Besides, there are biological weapons used to set disease to outrange enemies. The weapons emit disease organisms through missiles. Anthrax disease organisms are the commonly used in such weapons. Last but not the least, conventional weapons are used to inflict violence. They include traditional forms of weapons such as explosives and rifles (Sagan 6). Such weapons are used to cause physical harm to people through direct contact and in more active combat. As much as weapons are a significant part of the technology that inflicts violence, there are other forms of technologies that supplement them. The...

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chemical reaction, can dissociate the acidic solution into carbon dioxide and water and thus maintain the required level blood pH(Ferreira, 2015). References Ferreira, C. M., Pinto, I. S., Soares, E. V., & Soares, H. M. (2015). (Un) suitability of the use of pH buffers in biological, biochemical and environmental studies and their interaction with metal ions–a review. Rsc Advances, 5(39), 30989-31003. Varum, F. J., Merchant, H. A., Goyanes, A., Assi, P., Zboranová, V., & Basit, A. W. (2014). Accelerating the dissolution of enteric coatings in the upper small intestine: evolution of a novel pH 5.6 bicarbonate buffer system to assess drug release. International journal of...

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chemical firm, researches the new breed of seedlings such as soybeans that are resistant to herbicides and harsh climatic conditions. The article focuses on the incident in Texas where farmers banned the sale and spraying of the Dicamba herbicide in the state of Aransas. The Monsanto Company had earlier p[provided the farmers with a Xtend soybean variety that was said to be tolerant to the chemicals. This meant that once sprayed, the Dicamba only affected the weeds and left the genetically modified seeds untouched to grow to maturity (Charles, 2018). However, the hot weather led to the evaporation of the herbicide that spread to adjacent vegetation leading to stunting in crops that were intolerant...

chemical, or biological. For physical factors, they are ultraviolet and ionizing radiation. Chemical cancer-causing agents are asbestos, tobacco smoke, aflatoxin, arsenic. For natural carcinogens, there is the infection from viruses, bacteria, and parasites (WHO, 2018). Cancer is partially a behavioral disease as the use of alcohol and tobacco, lack of physical activity, and unhealthy diet, are significant causes of cancer. The outlined triggers are the four known risk factors for noncommunicable diseases. Up to 50% of cancer cases can get prevented if risk factors are avoided (WHO, 2018). Also modification of risk factors can help lower the possibility of developing cancer. Tobacco use is the...

Chemical and Physical Meteorology, 47(3),...

Name: Course: Instructor: Date: Hydrogen Bonding-Water Drops on A Penny Results Trial 1 Trial 2 Trial 3 Trial 4 Average Tap water 33 39 36 42 37.5 On soap-washed penny 15 20 17 22 18.5 Calculations The calculations conducted in the laboratory were supposed to get the average of the four trials Average: (Trial 1 + Trial 2 +Trial 3 + Trial 4)/ 4 Untouched penny average: (33+39+36+42)/4= 37.5 Soaped penny: (15+20+17+22)/4= 18.5 Discussion From the results above, it is clear that the penny that was not soaped required many water droplets before they spilled, as compared to the washed-up penny that requires fewer water droplets before spilling. This phenomenon is attributed to the surface...

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