Chemistry

Water’s adhesion, cohesion, polar bond benefit humans. 

An alkyne is an unsaturated organic hydrocarbon that has the formula CnH2n-2. These are the most reactive hydrocarbons and cannot form a ring. Use the knowledge you have gained from bonding of alkenes and alkanes and comment on why alkynes cannot form a ring and why they are the most reactive hydrocarbon in this discussion.

The essay should focus on how alcohol is metabolized in the human body and how it deteriorates or affects the brain and liver. Some alcohol-related diseases in the brain or liver should be discussed.

Write an abstract of the N-heterocyclic carbene as a ligand rank among the most powerful tools in organic chemistry, with numerous applications in commercially important processes.

How does the shape of an ice cube affect how quickly it melts?

Are biopolymers viable alternatives to replace traditional plastic

SOLVE these two word problems, and show all work 3. The activation energy of a forward reaction is 146.8 KJ and the ?H = 54.2 KJ. Draw an energy profile diagram for this reaction and (i) calculate the activation energy of the reverse reaction, (ii) show the effect of a catalyst on the diagram. 6. The activation energy of a reaction is 56.8 KJ and the ?H = -24.2 KJ. Draw an energy profile diagram for this reaction and (i) calculate the activation energy of the reverse reaction, (ii) show the effect of a catalyst on the diagram.

There is a long history of the use of medicinal plants to treat specific medical conditions. Many early medicines fall into the category of nitrogen-containing plant products called alkaloids. Ephedrine is an alkaloid which was originally extracted and purified from Ephedra sinica (ma huang) plant. Ephedrine is used for temporary relief of shortness of breath, chest tightness, and wheezing due to bronchial asthma. This biologically active compound has basic amine on its structure and the isolation/purification procedures relay on liquid-liquid extraction with sequential basic and acidic aqueous solutions and finally crystallization of the final compound. Please research and write a procedure (no longer than a page) for a student who use your procedure and be able to purify this compound. Also, write the reaction equation (or using a chart that show reaction of acid and base) for each step of extraction.

A very important part of any scientific discipline is being able to communicate technical information in a clear, concise, and academically rigorous manner. This includes being able to research information that is relevant to a topic and write about what you learned in a way that is easily understood by a wide variety of readers. In this assignment you will describe a chemical reaction that you personally routinely encounter. Examples would include reactions that occur during cleaning, in the garden, are health and beauty related, are related to your car, to hobbies, or even reactions that occur within the body. Just choose a topic that interests you! Since this assignment is focused on being able to communicate a scientific process properly and clearly, the format can be either APA style or MLA style. Purdue Owl is a great resource for either one of these two styles. Your essay should also be: ?  3-5pagesinlength ?  Doublespaced(2.0spacingoption) ?  ContainproperEnglish,spelling,andgrammar ?  Have both proper in text citations and a work cited page ?  Savedaseithera.docor.docxfile You will need to use the internet to gather information on the reaction of your choice. There is a minimum requirement of 3 scholarly sources (Wikipedia is not a scholarly source), either primary or secondary is fine. If you need help understanding what qualifies as an acceptable primary or secondary source, feel free to use the resource below. ? ResearchandCitationResources This essay is intended to allow you practice for communicating factual scientific information, so personal opinions and emotional appeals should not be included. It is okay to include your own relation and interest to the topic, but beyond that it should just be communicating what is going on and why. Suggestedoutline: ? Introduction ? Body Paragraphs:address what the reactants are, what the products are (show a balanced chemical equation), describe the reaction mechanism, whether it is an acid- base or oxidation-reduction reaction, what conditions this reaction occurs under (temperature, pressure, solvent, concentration, catalysts, light/dark), whether it is endothermic or exothermic, how the reaction is used, and how often it is used. ? Conclusion ? Workcitedpage

Two aqueous solutions are combined in a beaker. One solution contains 300.0 grams of potassium phosphate and the other contains 300.0 grams of calcium nitrate. 1. (2 Points). Write the balanced chemical equation for the reaction.2. (2 Points). What type of chemical reaction is involved? 3. (20 Points). What mass of each of the following substances is present when the reaction stops? (Show work).A. Potassium phosphateB. Calcium nitrateC. Calcium phosphateD. Potassium nitrate 4. (2 Points).Which reactant is limiting? (Use complete sentences)5. (3 Points). Which reactant is in excess, and by how much? (Use complete sentences)6. (3 Points). Which product precipitated and which product remained in solution? (Use complete sentences)7. (3 Points). Assume that 150.0 grams of your product were produced in the laboratory, calculate the percentage yield?8. (5 Points). Summarize in writing, using complete sentences, the chemical principles used to arrive at your conclusions.