Environmental chemistry

In Greek, this is an onomatopoetic word. This means it’s a word that imitates the sounds associated with the objects or actions it refers to (like the word buzz in English sounds like the sound a bee makes when he is flying around). The word zeloo imitates the sound of boiling water, and it literally means to bubble over because it’s so hot! In a positive sense, zeloo is to be zealous in the pursuit of good, to desire earnestly, to strive after, to pursue, to be eager to possess. In the…

1.7.3.4. Hydrogen sulphid test (MacFaddine, 1980): Tubes of triple sugar iron agar media were inoculated by suspected culture through stabbing into the butt and the slant then covered with sterile melted paraffin wax and incubated anaerobically for 48 h at 37°C, appearance of blackening in the butt indicates H2S production. 1.7.3.5. Sugar fermentation test (Willis, 1977): Suspected culture was inoculated to 1% peptone water tubes containing 2% bromocresol purple and 1% quantities of the…

Tyler White CHEM151LL 13851 07/18/2017 Mole to Mole relationship and Empirical formula of a Hydrate Purpose: The purpose of this lab experiment is to determine the molar ratio between substances, and to write chemical equations. The second experiment is to determine the ratio of water in copper, and magnesium, which is obtained through burning the vapor using the Bunsen burner. Materials: Because the experiments were conducted online there wasn’t any use of materials, only digital ones, for…

Q1) State the normal values for the partial pressure of O2 at sea level (with barometric pressure of 760 mmHg) in the following a. Inspired air b. Alveolar air c. Arterial blood d. Venous blood 1a- 149mmHg 1b-100-104 PaO2(mmHg) 1c-95-100mmHg 1d-40-50 mmHg Q2) Interpret the probable underlying cause when a person becomes unconscious and dies on exposure to an atmospheric pressure of 200 mmHg. When the human body is suddenly exposed to this pressure…

1. Observation. - Compound X is a white powder. It is a solid. 2. Questions. - What is compound X? - What will happen when compound X is heated and reacted with C20H14O4 (phenolphthalein – an acid-base indicator)? (1) - How does compound X react with C20H14O4 (phenolphthalein)? (2) - How does compound X react with water? (3) - How does compound X react with hydro chloric acid (HCL)? (4) 3. Predictions. - Compound X is calcium carbonate (CaCO3). - (1) When compound X is heated and reacted with…

1 WRITTEN ESSAY Paragraph 1 The FePO4 crystal is examined at various temperatures ranging between 294K and 1073K by neutron powder diffraction. At relatively low temperatures, FePO4 adopts an α-quartz structure, which is tetrahedral. High pressures causes a phase change to a more dense octahedral structure, which is known as β-phase. The transition temperature is 980K. Cutoffs can be observed during the firstorder transition,. For α-phase, the increases in cell parameters…

synchronously. Therefore, two molecular species involve with the rate determining step, and this leads to the term bimolecular nucleophilic substitution reaction or SN2. The rate of the SN2 reaction can be expressed by rate = K [R-LG] [Nu–]. In inorganic chemistry, this reaction also called “associative substitution” or “interchange mechanism.” The following figure illustrates the mechanism of SN2 reaction. Here, nucleophile attacks the opposite direction of the leaving group. Thus, SN2…

on temperature. Melting point range for unknown three that was lastly tested was matched to Acetaminophen by comparing their melting points. Introduction: Melting point is loosely defined as the temperature at which a solid becomes a liquid. In chemistry, melting point, also recognized as the liquefaction point, refers to the temperature at which the solid and liquid phases of a compound are equal. Melting points are used when deciding the purity of a…

III )Krebs cycle The Krebs cycle consists of five major points . There is in firstly the general overwiew of cellular respiration and in secondly mitochondrie structure then Acetyl-Coa wich contains Production and possible fates then Krebs Cycle wich contains reactions and regulation and finally Glyoxylate cycle. For the general overwiew of cellular respiration we will talk about cellular respiration. Cellular respiration is an aerobic phase of catabolism in which organic fuel molecule are…

Paragraph 1 The research done by Haines on how the atomic structure of FePO4 varies when temperature increases from 294K to 1073 shows few crystal chemical relationships between SiO2 and FePO4. There is a first order variation of cell parameters and atomic orientations with temperatures lower than 980K and α-phase plays a dominant role over β-phase at high temperature. For the α-phase FePO4, the cell parameters increase with a non-linear trend when temperature increases linearly. The volume…