Balancing of Chemical Equation | Instant Homework Help

The fluoride rinse in dental offices usually contains sodium fluoride. Sodium fluoride can be prepared from the reaction between sodium metal and fluorine gas. Which properly represents the balanced chemical equation for this reaction?Na(s) F2(g) ? NaF2(s)Na(s) F(g) ? NaF(s) 7Na(s) F(g) ? Na7F(s) 2Na(s) F2(g) ? 2Na2F(s) 2Na(s) F2(g) ? 2NaF(s)Why is it important to understand this equation? What do you think could happen if this is incorrect?Provided APA format references

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History of Chemistry | Instant Homework Help

Part 1: In this assignment you will first identify your selection. Give the history of the person, his/her research that won them the Nobel Peace Prize. Also, share the process as to how the winner is chosen. Finally, state why you selected this person in your assignment. You may use the “Online Librarian” to assist in your research. This assignment must meet the following criteria: Minimum word count: 500 words APA format Work Cited page Part 2: Provide Feedback to me if this assisted in giving you a better understanding of the History of Chemistry and what could be done differently (3 paragraph maximum).

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Carbohydrates of Everyday Life | Instant Homework Help

Research a specific carboydrate that and its importance in biology. Discuss it’s structure, whether it is a monosaccharide, disaccharide, or polysachardide. If it is a monosaccharide, discuss its various isomers including where they are found and their approximate composition (i.e., percentages). If it is a disaccharide or polysaccharide discuss its imporatant linkages as well as where it is found in nature. Also describe which carbohydrate test could be used to detect its presence in solution. Your initial post must meet a minimum writing requirement (1 paragraph with at least 5 sentences).

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Periodic Table | Instant Homework Help

• Use the periodic table posted • CHOOSE/ SOLVE WHEREVER ASKED Please solve the questions from 1 to 4 and then review the question 5, which is multiple choice questions. If there is any line, change to the correct answer immediately, please.

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The Atomic Level | Instant Homework Help

1. Identify a substance that can exist in all phases here on Earth. Describe different phase changes and what happens to this substance at the atomic level during these phase changes.

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The Height Of A Mercury | Instant Homework Help

Explain why the height of a mercury column changes from day today.

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Benzaldehyde Calculations | Instant Homework Help

Procedure:Calculations1. Calculate the volume required to produce 0.0125 mol of acetone.2. Calculate the volume of 2.2 “equivalents” of benzaldehyde. (In other words, 2.2 times asmany moles of benzaldehyde as of acetone.) Note: the equation involves a simple 2:1stoichiometry.By using an actual 2.2:1 ratio, it ensures that the benzaldehyde is surplus and that theacetone is limiting. This is helpful for several reasons:a. Aldehyde oxidation. Aldehydes are often impure, because oxidation to carboxylicacid is fairly facile. By using 2.2 equivalents of benzaldehyde, then even if 10% ofthe benzaldehyde is corrupt we ensure that we still have enough to fully react with theacetone.b. Reaction Time. By having an excess of benzaldehyde, it makes it easier for thereaction to go to completion. Otherwise late in the reaction there isn’t muchbenzaldehyde left to react, so the reaction slows down a lot. By intentionally puttingin some extra, it maintains at least a minimal concentration of electrophilic till thevery end, such that getting 100% conversion of the ketone isn’t so hard and doesn’ttake so long. Ease of Product Purification: Disubstitution versus monosubstitution. Enablingcomplete conversion greatly simplifies purification. If complete conversion does notoccur, either because benzaldehyde runs out or because insufficient time is used, thedesired “disubstitution” product “dibenzalacetone”, in which two benzaldehydes havebeen incorporated, is contaminated by “benzalacetone”, the “monosubstitution”product in which only one benzaldehyde has been incorporated. Since the mono- anddisubstituted products aren’t that different, it’s not that easy to remove the undesiredside-product from the main desired product. But if you just make sure the reactiongoes all the way to the desired product, then you don’t need to worry about it!Doing the Reaction:1. Use a 125-mL Erlenmeyer flask with a magnetic stirring bar.2. Add 50 mL of the NaOH-Ethanol-Water solution mixture.3. Place the solution on the magnetic stirrers and adjust the stirring dial to get a nice, evenstirring action.4. To this add the calculated amount of benzaldehyde by syringe5. Add the calculated amount of acetone by syringe, last. (The acetone should go in last, afterthe benzaldehyde electrophile is already available. If the acetone goes in first, it could doaldol condensation on itself, in which enolate anions just attacks neutral acetone carbonyls.Ketone carbonyls aren’t competitive with aldehyde carbonyls as electrophiles, but if there areno aldehydes available, ketones are better than nothing!)6. Watch the solution carefully, with a watch, at the beginning of the reaction, so that you cankeep good observational records.How long does it take for the solution to turn yellow? Given that all the reactants arecolorless, what does the yellow color mean?

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Chemistry homework | Instant Homework Help

1. Explain why CO is named the “silent killer”. Select two other pollutants for which this name would not apply and explain why not.

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Learning about Nomenclature | Instant Homework Help

M04 Discussion: Nomenclature Instructions Reply to 2 classmates. Discuss your answers in a well-developed reply of five or more sentences. Please add your research to your peer’s post. Discussion Topic This week we are learning about Nomenclature. In your response to your peers, consider their answers. Do you agree? Why or why not? Can you add more information to their response? Do you have any questions on what they found? Please make your response at least 75 words. Reply to this: For my common everyday chemical compound I decided to pick salicylic acid. I picked this chemical compound because I basically see it every day, twice a day to be exact. It is one of the main chemical compounds found in my clarifying acne lotion. Salicylic acid works by causing the cells of the epidermis to slough off more readily, preventing pores from clogging up. Salicylic acid is better known in the chemistry world as 2-Hydroxybenzoic acid. Its formula is C7H6O3. This compound is a colorless, crystalline organic acid, and it is widely used in organic synthesis and functions as a plant hormone. Salicylic acid is derived from the metabolism of salicin. Salicylic acid modulates COX2 gene expression to decrease the formation of pro-inflammatory prostaglandins. Salicylate may competitively inhibit prostaglandin formation. Salicylate’s antirheumatic (nonsteroidal anti-inflammatory) actions are a result of its analgesic and anti-inflammatory mechanisms. Salicylic acid is commonly used in medications to help remove the outer most layer of the skin. Some of its most common uses are to treat acne, warts, dandruff, psoriasis, ringworm, and ichthyosis. In the pharmaceutical industry, salicylic acid was one of the original starting materials for making aspirin, dating back to 1897. Salicylic acid is also an active ingredient in stomach relief medications such as Pepto Bismol. Thanks to the salicylic acid, kaopectate, the main ingredient in Pepto Bismol, can actually act as a anti-inflammatory and as an antacid and mild antibiotic. Lastly, Salicylic acid is used as a food preservative, a bactericidal and an antiseptic. Reply to this: The chemical compound I chose is magnesium carbonate (MgCO3). I found it in a hair lightener product. A common name for it is magnesite. It is a salt of carbonic acid and is used in hair product because it acts as a binder and/or absorbent. It also helps in the adjustment of the PH of the product. Magnesium carbonate is in a lot of things and for various reasons. We consume magnesium carbonate in different ways such as biscuits as a demanding agent, as a food additive it is known as E504. It is added to food to retain color and in salt to make it free flowing as well as flour as an anti clumping agent. We can also take magnesium carbonate as a medication to help the bowels loosen. Toothpaste is another common household item where you can find magnesium carbonate. Other uses for magnesium carbonate are for weightlifters and gymnast when they use ” chalk” before performing. It acts as an absorbing agent in drying their hands. It is also used in glass production, cosmetics, fireproof items for insulation After doing some research on this compound it is in more items than I initially thought that it would be.

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