The Mole and Avogadro's ConstantTable of contentsNo headers
Please add Reviews in the Comments Section below, there is no Poll currently. |
The Mole and Avogadro's ConstantTable of contentsNo headers
Please add Reviews in the Comments Section below, there is no Poll currently. |
1.Synopsis: A mole is a way of measurement like the term dozen that equals 6.02 x 1023. This number is also called Avogadro’s constant. One mole of an element equals Avogadro’s constant which is also equal to the molar mass. The molar mass is the mass of one mole of atoms of a particular element.
2.Keywords: Chemistry mole (Yahoo), Avogadro’ number (Google), Molar mass (Google)
3.Review Details: This module is off to a good start but needs some work. When you are explaining the molar mass you use the word atomic weight, you should mention that this can be found in the periodic table. You mention Avogadro’s number but your module name is Avogadro’s constant. Therefore, you should mention that Avogadro’s constant is the number and the unit (mol-1) together. In your definition of molar mass, to better clarify, you should add that the molar mass is the mass of one mole of atoms. Since you talked about molar mass, molecular weight might be a good thing to mention in your module as well. You might want to add the answers to your practice problems at the end of your module.
Synopsis: One mole is equivalent to 6.0221415 x 10^23 “entities” (moles, molecules, atoms, or formula units). Avogadro’s number is used for conversions when attempting to solve for the amount of atoms in one mole of an element since amount of atoms is such a gigantic number. Scientists obtain this number from 12 grams of carbon-12, where for 12 grams of carbon-12, there is 6.0221415 x 10^23 carbon atoms.
Keywords: Google (Avogadro’s constant), Yahoo (Mole number), Bing (Mole conversion)
Review Details: Overall, the module is good since it explains how Avogadro’s constant could be used in calculations. However, you didn't mention in your module that Avogadro's number has units 1/mol or mol^-1, which may confuse the reader. In the video, you mentioned the possible units for Avogadro’s number, but maybe you could be more specific as to when the units can be used by giving one or two examples involving the units. Also, in the introduction, make sure you mention “where” to find the molar mass (periodic table, even though it was in the video). The module’s length is quite short. It would be nice to see examples and maybe some pictures as well. There were little punctuation and spelling errors.
(Optional: Fix your headings; change from Heading 2 to Heading 1)
Mistake: Changed “things” to “entities”. (Just to be a bit more specific)
Fixed: “Example” – Moved from “Contributors” to “The Mole and its Application”
“In video” correction: Change from “2 moles of Calcium” to “2 moles of Chlorine” edited 00:48, 4 Dec 2009
1.Synopsis: The module focuses on, as the title implies, the mole and how its meaning is related to Avogadro's Constant. It goes into conversions between moles and grams as well. One Mole is 6.02*10^23 particles, and the way to change that to grams, or relations to Molar Mass, are portrayed.
2.Keywords:
Avogadro's Number (Google used)
Mole SI Unit (Google used)
Avogadro's Constant and Mole (Google used)
3.Review Details:
The module as a whole is fine, but it could benefit from some changes. You could link to other modules that relate to your topic, such as Atomic mass. Perhaps adding the history of the Mole might add some more substance to the module. There were a couple errors in grammar in the first paragraph, which I fixed. Under Applications, you could also state why you would possibly need to switch between grams or moles, such as for chemical reactions. edited 23:38, 4 Dec 2009
1. Synopsis: This module discusses the concept of a mole and Avogadro's Constant, and explains how scientists use the measurement of a mole because even a visibly small amount of a substance has millions of atoms. By using molar masses on the periodic table, we can convert from grams to moles to number of atoms. This module discusses various types of calculations that can be made using moles.
2. Ready for next vet level? This module appears ready for the next vet level as there are few grammatical mistakes and everything seems correct.
3. Review details: This module is fairly complete, but there are a few things that can be improved. For example, you may want to discuss in a bit more detail how the molar mass in g/mol and atomic mass in amu are related. Maybe discuss how one atomic mass unit is exactly 1/12 the mass of a Carbon 12 atom and a mol is the number of atoms in a 12 gram sample of Carbon, so we are allowed to say that the molar mass is the same numerical value of the atomic mass on the periodic table. I thought the video was good, and the examples and explanations were for the most part good. However, I think it would be beneficial to have an example somewhere along the lines of say: "how many moles of oxygen are in 10.0 g CO2?" where you have to recognize that one mole of CO2 molecules has 2 moles of oxygen atoms. Some pictures might also be nice. For example, in the video it talked about how a mole of grapefruits would cover the whole earth; maybe find a picture for the reader to visualize just how big of a number 6.02x10^23 is.
4. I added an "and" in the paragraph titled "The Mole" to eliminate an awkward sounding sentence.
5. No plagiarism edited 17:59, 28 Nov 2010
1. The mole and Avogadro’s constant is used a lot and made it possible for scientist to have big numbers for atomic particles. The number 6.02214179 x 1023 is used a lot for conversions such as from moles to grams.
2. This module is ready to go to Vet2 level, there are no misspellings, everything is accurate and is organized well.
3. The length is appropriate, it isn’t too long nor too short. There are a lot of practice problems which is good, because practice is really important. This module is fine with English.
There are no figures in this module, although there is a video. The video is quite helpful, but if someone makes a PDF of this module, the video is useless. May be there should be a script for the video provided. For the examples in the applications of the mole, example and number may be can be underline so that there will be a distinction.
4. I changed the ‘of’ in this sentence to in. The mole is an important aspect of chemical equations and stoichiometry.
5. This module passed through all of the plagiarism checks.
6. There are no figures used in this module.
Synopsis: The module introduces the concept of the mole and Avogadro's constant as fundamental tools for chemistry. A mole is a practical way for scientists/researchers to deal with large amounts of material for atomic particles. It is crucial in chemistry or science to use the mole because we often deal with atoms which are very difficult to count individually and with certainty. It describes what a mole is and how it can be applied in chemical equations. A great feature of the module is examples of using the mole in stoichiometry.
Keywords searched under Google: Amedeo Avogadro, mole, molar mass
Review: This module is accurate and it describes the mole adequately. However, it could do a better job of explaining a mole by using other examples instead of ions or molecules. For instance, they could explain further why or what historical problem arose. What is written is merely that we need a large number to count atomic particles. But we don't know where the source of this problem comes from. The detail seems a bit cursory. The English is correct and there are minimal grammatical issues.
There aren't any figures used here but it may be helpful to include a periodic table and explain that for each element on the table, the atomic weight is an average of the weight of all the naturally occurring elements. But we don't know how many occurs so we use the mole because it would be much too difficult to count all those atoms in a sample of an element. Also,adding images of say a box of a dozen eggs to illustrate the use of a mole would be helpful and it would give the module more life because it seems bare right now except for the video.
Instead of squishing together the "(molar mass of substance/one mole of substance)" you could just center it discretely in the center of a page to avoid confusion?
No figures used here nor are tables used.
No plagiarism detected.
This module is sufficiently ready for Vet2 level. It has the right amount of information and minimal grammar issues and spelling issues.
I deleted extra spaces between "One mole is 6.02214179 x 1023 entities" to One mole is 6.02214179 x 1023 entities. Also, deleted an extra "the" in - "of a substance and we want to find the the number of atom." edited 21:31, 28 Nov 2010
2. The module is ready to go to Vet2 level. It has few grammatical errors and all of the information provided is correct.
3. The overall content is good, but it can be greatly improved. The topic is not fully explained in detail and can be developed further to facilitate reading comprehension. The problems at the end of the module demonstrated the topic well, as well as provided a good source of basic practice problems. There could be a figure depicting the conversions from mol to atoms, etc.
Plagiarism: No plagiarism was detected. edited 21:39, 4 Jun 2011