ENVIRONMENTAL PROBLEMS BIODIVERSITY LOSS Biodiversity - refers to the number and size of populations in a community; variability of species in an area In general‚ there are three categorical levels of biodiversity: 1. Genetic biodiversity - involves populations‚ individuals‚ chromosomes‚ genes and nucleotides 2. Taxonomic biodiversity - include kingdoms‚ phyla‚ orders‚ families‚ genera‚ species‚ subspecies and populations - for practical reasons‚
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1) What is the purpose of ice or cold water? To cool down the gas so that it condenses and turns into a liquid. 2) when the gas collecting tube is upside down‚ give a property of this gas. It is less dense than air. 3) Why is a pencil used in drawing the origin line in chromatography? If pen was used‚ it will dissolve giving colours and so‚ the experiment won’t be accurate. Pencil doesn’t interfere with the results. 4) When using ethanol‚ give a better apparatus arrangement‚ and why? Cover
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GLOBAL CLIMATE CHANGE = GLOBAL WARMING In the last past years‚ the Earth has been experiencing increasing temperatures‚ leading to harmful consequences on our planet and its habitants. This has been researched and analysed‚ concluding to name such changes as Global climate change. As explained by the US agency‚ the National Oceanic and Atmospheric Administration (NOAA)‚ there are 7 indicators that would be expected to increase in a warming world‚ and 3 indicators would be expected to decrease.
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The Grignard Synthesis of Triphenylmethanol Abstract: Grignard synthesis of triphenylmethanol was achieved by use of the Grignard reagent phenyl magesium brominde. The organometallic grignard reagent was synthesized by use of a reflux apparatus recrystallization techniques. Once synthesized it was used in a Grignard reaction that involved nucleophilic addition to a carbonyl in order to make triphenylmethanol. The final product was solidified and recrystallized and spectral data was
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a noble gas configuration? Explain your answer using your energy level diagrams. www.njctl.org ChemistryQuantum Num. & Periodic Table Aufbau CW 13. What is the electron configuration of Iron? 14. What is the electron configuration of Bromine? 15. What is the electron configuration of Lithium? HW: 16. What is the electron configuration of Strontium? 17. What is the electron configuration of Nickel? 18. What is the electron configuration of Francium? Noble Gas Shorthand CW: 19
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(cathode). iii Oxidation: Sn(s) Sn2+(aq) + 2e– Reduction: Ag+(aq) + e– Ag(s) iv Sn(s) + 2Ag+(aq) Sn2+(aq) + 2Ag(s) v Anode: tin. Cathode: silver vi 0.94 V b i Br2 is the strongest oxidant. ii Electrons flow from the magnesium towards the bromine half-cell. iv Mg(s) + Br2(aq) Mg2+(aq) + 2Br–(aq) v Anode: magnesium. Cathode:
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KAROT OR ASIATIC BITTER YAM (Dioscorea hispida dennst) AS A RAT KILLER CHAPTER I Introduction Health is wealth. Food plays very vital role in maintaining proper health. If we don’t have it‚ we will surely die. In our country‚ Philippines‚ we cannot finish a meal without having the food called rice. Not only in Philippines but rice is also a global staple food. The country is the 8th largest rice producer in the world‚ accounting for 2.8% of global rice production. Rice is an
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Mass Spectrometry MS Interpretation General Interpretation Strategies i Wherever you see this symbol‚ it is important to access the on-line course as there is interactive material that cannot be fully shown in this reference manual. Aims and Objectives Aims and Objectives Aims • Introduces students to the principles of mass spectral interpretation. • Present fundamental concepts regarding mass spectral interpretation Objectives At the end of this Section you should be able to: •
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CONTACT PROCESS Sulfuric acid is one of the most important industrial chemicals Outline three uses of sulfuric acid in industry 1. The major use of sulfuric acid in Australia is in the manufacture of fertilizers such as ammonium sulfate and superphosphate. Superphosphate is produced by reacting sulfuric acid with rock phosphate. Ammonium sulfate is produced by neutralising ammonia with sulfuric acid. 2. Production of titanium (IV) oxide from titanium minerals eg ilmenite. Titanium is an important
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Oxygen (1770s) [pic] British educator and philosopher Joseph Priestley (1733 – 1804) discovered oxygen in experiments‚ isolated the gas‚ and described its function in combustion and respiration. He also invented soda or carbonated water by dissolving fixed air with water. Unaware of the significance of his discoveries and because of his stubborn refusal to abandon the phlogiston theory‚ he named the new gas “dephlogisticated air.” However‚ it would be the French chemist Antoine Lavoisier (1743
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