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Angmor that question has already been done on the previous page. Describe the process by which ozone smog in cities occurs, including in your answer the origon of the pollutants, when the problem is at its worst and why. The formation of phtotochemical smog involves ozone reacting with oxides...

1. cant be bothered with typing equations so just describe. CFCS undergo photodissociatyion with ultra violet radiation producing chrlorine free radicals. the chlorine free radicals then attack ozone molecuels forming chrlorine oxide molecule. the chlorine oxide molecule then reacts with oxygen...

I know u need to know how to calculate questions from back titrations but i never knew u had to describe back titrations. They dont even specifcally show it any of the 3 study guides for chem i have so i believe it is not important to knwo other than calulate problems Question: Describe the...

Question: What chemical tests could be used to identify copper in a waterway and what concentration could be considered problematic. To identify the prescence of copper in a waterway, a few drops of sodium hydroxide can be added to a sample of water. If a blue precipitate forms then copper is...

Question: What chemical tests could be used to identify copper in a waterway and what concentration could be considered problematic. To identify the prescence of copper in a waterway, a few drops of sodium hydroxide can be added to a sample of water. If a blue precipitate forms then copper is...

There is an increase in ozone depletion over Antartica during spring due to an increase in solar UV radiation folowing a long winter. During winter, the solid partilces (i.e ice) catalyse the reaction between HCL and chrlorine nitrate producing molecular chlorine.AS the sun rises in early...

The conversion of glucose into ethanol-water mixture involves yeast fermentation. This involves crushed sugar wastes such as mollasses being added to water with yeast, in the absence of oxygen at 37 degrees, in a fermneter vessel. The enzymes in the yeast cells covert starch and sucrose into...

For a substance to be suitable for a primart standard it must be stable in air, have a high molar mass, have accurately known formula, a water soluble solid and have a high purity. Sodium hydroxide is hygroscopic and absorbs water from the atmosphere thus not a good primary standard. As well as...

By replacling the voltmeter with a generator, the cell acts in reverse as an electrolytic cell converting electrical energy into chemical energy. The anode is positve and cathode is negative. Copper will be reduced and silver is oxidised. CU^2 + 2e^-1 ->Cu(s) Ag(s) -> Ag^+2 + 2e^-1 Thus...

Genes are neccessary in the maintenance of health. Genes provide the code for protein production required for normal growth and repair. And since enzymes are proteins then genes control metabolism allowing celluar processes to occur. Thus assist in maintining health Mitosis is a type of cell...

Gene expression in neccessary in assisting in the maintenace of health. Genes provide the code for protein production required for growth and repair. And since enzymes are proteins, then gene expression controls metabolism and hence cell activity. thats all i knwo about gene expression...

Question: Describe the experiment conducted in your course of biolgy which showed the effects of temperature, pH and substrate concentration on a particular enzyme Question:Define substrate concentration and enzyme Question: Give an example of an oragnism and narrow temp range of survival...

Question: Differenciate between homozygous and heterozygous genotypes Question: Discuss the shift in emphasis form treatemtn and control to prevention and mangaement of disease Questiuon: Discuss the effectiveness of vaccinations in preventing the spread of once common diseases such as...

Question: identify data sources, gather process and analyse information from secondary sources to describe one named infectious disease in terms of its: o cause o transmission o host response o major symptoms o treatment o prevention o control Infectious Disease: AIDS (Accquired Immunodefiency...

I dnt believe it is neccessary to know mhc i and mch ii for the biology HSC course. Its beyond the scope of our course as it does not state it anywere in the syllabus. As well as that yuou do not need to know the host response of malaria it only asks the Histroical deveolpment of tratement and...

The catalyst lowers the activation enrgy required for reaction and thus speeds up rate of reaction and loweres the temperatures required for the Haber process. The catalyst used in the haber process is a porous iron/iron oxide catalyst containing small amouts of aluminuim oxide and potassium...

Simplistic, i believe one of your answers is incorrect. That is the one regarding the fish and mammals excretory system. The gills are used to remove nitrogenous wastes such as urea whilst excess salts/water removed in urine. Question: Distinguish between: - prions -viruses -protozoans...

Question from page before : selective breeding and hybridisation Selective breeding is the careful selection and controlled mating of members of a species to produce offspring gradually with desired characteristics. Hybridsisation involves producing offspring of two species of the same genus...

Q 1. The Kidney is a complex organ of the excretory system of both the fish and mammals which is involved in filtration, reabsobtion and secretion. The role of the kidney in the mammal is to excrete nitrogenous wastes as well as maintain osmosregulation. The role of the kidney in fish varies...

Meiosis is a type of cell division that produces sex cells (i.e gametes) that contain half the number of chromosones as the original parent cell. During Meiosis, different pairs of homologous chromosones behave indepentely of each other. The genes on the different homologous chromosones behave...