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Hydrogen Cyanide Hydrogen Cyanide (HCN) is an extremely poisonous liquid discovered in 1782 by Carl Scheele, a Swedish chemist. HCN is very toxic because it stops cells from using oxygen properly thus causing death. Although HCN is a great solvent for salts, it cannot be used due to its high toxicity. Even though it is general stable, it has the capacity to combust in the company of basic substances such as ammonia or sodium cyanide. What is its structure? The structure of Hydrogen cyanide is…

The Identification of an Unknown Substance Using a Series of Tests Project 2 Chemistry 111 – 552 Peyton Farmer*, Primary Author Partners: Jacob Hicks and Abigail Boudreau TA: Ming Uei Hung Introduction The purpose of this experiment was to use elimination and confirmation tests for both cations and anions, which then allowed the unknown substance to be identified by using logic trees of known solutions. Some qualitative characteristics of chemicals such as the formation of a precipitate, the…

In Co(NH3)6Cl3, since the complex has a total charge of zero, ammonia has an oxidation number of 0, chlorine has an oxidation number of -1, cobalt has an oxidation number of +3. Therefore, there are four electrons in the d orbital of a cobalt in this complex. Figure 8 gives the possible high spin and low spin combinations for four d orbital electrons. The high spin config- uration has four unpaired electrons and the low spin configuration has two unpaired electrons. Figure 7. High and low…

The lattice symmetry of quartz α-FePO4 is trigonal. Its space group is P3121. The lattice symmetry of quartz β-FePO4 is hexagonal. It space group is P6422. According to the article, only two of the various quartz homeotypes which exhibit alpha-beta transitions have been studied in detail at high temperature. One of them is Silicon Dioxide. As such, it is possible for silicon dioxide to have the same structure when the chemistry is completely different. Since iron…

Which one of the fo llowing is often easily separated into its components by simple techniques such l) as filtering or decanting? A) homogeneous mixture B) solutions 0 heterogeneous mixture D) elements E) compounds 2) An clement cannot 2) A) be part of a heterogeneous mixture Ji,) be a pure substance is corrccl for ___ _ 19) A) elements B) homogeneous mixtures Ohcterogeneous mixtures D) compounds 20) Which of the fo llowing is an example of a lieterogeneous mixture? @ oil and vinegar B) 70%…

Physical properties of PHB: PHB physical properties similar to polypropylene. However, PHB is perfectly isotactic and does not include any chain branching like, for instance, PE. During processing, it flows easily. It is insoluble in water and soluble in chloroform and other chlorinated hydrocarbons. It exhibits good barrier properties against oxygen and compared to other biopolymers. It possesses better physical properties than polypropylene for food packaging applications. (Chaijamrus & Udpuay…

Atomic mass: the mass of an atom of a chemical element expressed in atomic mass units; approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes Molar mass: a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by the amount of substance Mole: the amount of a substance contained in 6.02 x 10²³ particles of that substance…

It was determined that Substance A is a covalent molecular substance as it is a liquid at room temperature and therefore has a low melting point which is a property of a covalent molecular substance. Substance B was found to be a metallic substance as it demonstrated properties such as high melting point, conductivity as a solid etc. Substance C was found to be a covalent network structure as it did not conduct and was very hard and had a high melting point. Both Substances D and E were very…

: The chemical formula of a compound will be determined using the mass of each individual element that is present in a weighed sample of that compound. The chemical formula shows the proportions of elements in a specific compound. This proportion is uniform to all samples of the same compound. Using the mass of each element, the moles of the element in the compound can be found and then compared to that of the other elements. This will create our atom ratio which will lead to our mole ratio. The…

Justin Haynes Organic Chemistry C17H20N4O6 I was given molecule 9. This molecule has the general name of Riboflavin has the chemical formula of C17H20N4O6. This can also go by two IUPAC names the first being 1-deoxy-1-(7,8-dimethyl-2,4-dioxo-3,4-dihydrobenzo[g]pteridin-10(2H)-yl)pen titol. The second name it can also go by 7,8-dimethyl-10-(2,3,4,5-tetrahydroxypentyl)benzo[g]pteridine-2,4(3H,10H)-d ione. While this molecule has the generic name of Riboflavin now .This molecule has been…