Avogadros Number - Example Chemistry Problem

Avogadros Number Chemistry Problem Avogadros number is used in chemistry when you need to work with very large numbers. Its the basis for the mole unit of measurement, which provides an easy way to convert between moles, mass, and the number of molecules. For example, you can use the number to find the number of water molecules in a single snowflake. (Hint: Its an enormous number!) Avogadros Number Example Problem - Number of Molecules in a Given Mass Question: How many H2O molecules are there in a snowflake weighing 1 mg? Solution: Step 1 - Determine the mass of 1 mole of H2O Snowflakes are made of water, or H2O. To obtain the mass of 1 mole of water, look up the atomic masses for hydrogen and oxygen from the Periodic Table. There are two hydrogen atoms and one oxygen for every H2O molecule, so the mass of H2O is: mass of H2O 2 (mass of H) mass of Omass of H2O 2 ( 1.01 g ) 16.00 gmass of H2O 2.02 g 16.00 gmass of H2O 18.02 g Step 2 - Determine the number of H2O molecules in one gram of water One mole of H2O is 6.022 x 1023 molecules of H2O (Avogadros number). This relation is then used to convert a number of H2O molecules to grams by the ratio: mass of X molecules of H2O / X molecules mass of a mole of H20 molecules / 6.022 x 1023 molecules Solve for X molecules of H2O X molecules of H2O ( 6.022 x 1023 H2O molecules ) / ( mass of a mole H2O  · mass of X molecules of H2O Enter the values for the question:X molecules of H2O ( 6.022 x 1023 H2O molecules ) / ( 18.02g  · 1 g )X molecules of H2O 3.35 x 1022 molecules/gram There are 3.35 x 1022 H2O molecules in 1 g of H2O. Our snowflake weighs 1 mg and 1 g 1000 mg. X molecules of H2O 3.35 x 1022 molecules/gram  · (1 g /1000 mg )X molecules of H2O 3.35 x 1019 molecules/mg Answer There are 3.35 x 1019 H2O molecules in a 1 mg snowflake. Avogadros Number Problem Key Takeaways Avogadros number is 6.02 x 1023. It is the number of particles in a mole.You can use Avogadros number to convert between mass and the number of molecules of any pure substance.If you are given the mass of a sample (such as a snowflake), convert the mass to moles, and then use Avogadros number to convert from moles to molecules.

Sobeit and So Be It

Sobeit and So Be It Sobeit and So Be It Sobeit and So Be It By Maeve Maddox Jean writes: Could you do a feature on so be it and sobeit? Â  I thought for sure it was always written as three words until a discussion on a court reporters message board came up about a proofreader saying that it should be a one-word word. Sobeit is a word and so be it is a clause. Neither is much used in ordinary conversation or writing, but legal language tends to be on the old-fashioned side. The clause so be it is a subjunctive expression meaning let it be so. Example: Aladdin: I want a huge palace with a thousand servants and a swimming pool. Genie: So be it! Sobeit can be used as conjunction or as a noun. As a conjunction sobeit means provided that, if. Example: I will finish this 800-page novel, sobeit I live long enough. Sobeit can also be used as a noun, as in this example from the OED: Thou answerest me an houre after..like to a Sexton with a Sobeit or Amen. Whether to spell it as one word or write it out as three words depends upon the context. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Vocabulary category, check our popular posts, or choose a related post below:Farther vs. FurtherTry to vs. Try and30 Nautical Expressions

The Development of Electronic Music in the age of Post Modernism Essay

The Development of Electronic Music in the age of Post Modernism - Essay Example This further allowed the reintegration of Acoustic sounds to allow for the reintegration of Acoustic sounds through carefully sampled computer based musical instruments. (Schwartz, S. 1993.).This is particularly true in terms of the graphic signal-processing software which when it came out allowed for real-time MIDI control allowing the post modern composer to use this system even with limited technical knowledge. Chadabe, J, 1997).The availability of of such techniques and the further advent into the market of the Yamaha DX-7 MIDI keyboard in 1985 and of hard disk recording and editing softwares were all set to revolutionise Electronic music. (Schwartz, S. 1993.).The nineties further paved the way for more interactive computer-assisted performance and the release of the multimedia CD-ROM meant that the MIDI sequencing programmes were all set to expand to include digital audio. Chadabe, J, 1997). This is in contrast to the position of technology available for the electronic composers back in the 1940’s. where as the musicians were still struggling with amplifiers (for example John Cage’s Imaginary Landscape no.1 (1939)).Towards the fifties there was the Radio-diffusion-television upon which the modern musique concrete is based upon.The founders of the French version of the Groupe de Musicque Concrete included the likes of Messiaen, Boulez and Stockhausen. Another studio opened very soon under Karlheinz Stockhausen and made generous use of electronic sound generators and modifiers.

History of U.S. up to JFK Essay Example | Topics and Well Written Essays - 500 words

History of U.S. up to JFK - Essay Example After WWII, United States embraced capitalism at its best. During this time, change was an inevitable factor throughout the country. War bonds worth hundreds of billions of dollars matured, which gave the country the so much needed financial resources to kick start the economy. Using these and other government-provided resources, the country moved towards the realization of an economic boom. People’s quality of life improved, setting a desirable path for social, economic, and political prosperity. With massive investments already executed, the American workforce became the next point of focus. Among the most outstanding actions in this regard was the implementation of the G.I Bill. The G.I Bill accorded war veterans many different benefits, most of which played the role of financing education and training of workers for the realization of a knowledgeable, skilled, and reliable workforce (Chafe 107). Another key observation of the post WWII era was the emergence of labor unions in America. The 1950s marked the peak of labor union membership, and this allowed low-income workers to migrate from the countryside to towns and cities in search of better job opportunities (Chafe 168). By 1960, this migration process had allowed majority of Americans to hold employment positions that were better paying compared to previous couple of decades. Consequently, the growth and development of suburbs became vibrant across the U.S. Most importantly, U.S culture changed significantly between 1945 and 1963. Following the WWII, both the South and the West became important political regions as power shifted away from the Northeast and Midwest (Chafe 119). During this time, U.S had not only addressed major social issues, but also nurtured a cultural and social belief of international control. American people were convinced that they had a primary role to play in maintaining global peace and political order. A critical look at the global political economy revealed that the U.S

Jean Briggs Essay Example for Free

Jean Briggs Essay In 1963, an anthropologist called Jean Briggs, travelled for a seventeen month period to Chantrey Inlet to study a small group of Inuit Hunter-Gatherers, named the Utkuhikhalingmuit, or the Utku. She wrote an ethnography called Never in Anger to discuss her knowledge and ideas of her experience in this foreign environment. Instead of keeping distance and remaining outside from the field of research with the goal of scientific objectivity, Briggs engages into a more contemporary type of anthropological analysis, which is considered as intersubjective experience. By being aware of her own assumptions and emotions, Briggs uses them as a key to understanding the Utku way of being. Through sharing the same dwellings with Inuttiaq and his immediate family, Briggs was able to collect very rich and intimate behavioural data. Briggs was interested in looking at the expression of affection and hostility among the Utku. She learned what kind of behaviour is valued by focusing on few individuals: children, volatile Utku adults and foreigners, whose behaviour deviates from the ideal. Briggs was also interested in the methods that the Utku adopt in order to deal with misbehaviour. The Utku rely on each other mostly for food, warmth and protection, although independence is highly valued. Inuttiaq was very protective over Briggs, because she was unable to perform most tasks necessary for survival. The Utku would tell her that: You are a Kapluna, and alone here among people, you are someone to be taken care of. (Briggs, 1970: 185). Even though Briggs and Inuttiaq had their differences at the end of her stay, Inuttiaq continued to be protective towards Briggs, as it is very un-Utku like not to be generous and helpful. Inuit place a high value on mildness, gentleness and concern for others. Emotional control is an essential sign of maturity. As nurturance (naklik) defines goodness of a human being, so reason (ihuma) defines adultness. (Briggs, 1970: 359).

Mother Teresa: An Example of Servant Leadership Essay -- Mother Teresa

Servant leadership is both a leadership philosophy and set of leadership practices. Traditional leadership generally involves the accumulation and exercise of power by one at the â€Å"top of the pyramid.† By comparison, the servant-leader shares power puts the needs of others first and helps people develop and perform as highly as possible (Northouse, 2013). One person I feel is a great example of a servant leader is mother Teresa. Mother Teresa, Agnes Gonxha Bojaxhiu, was born August 26, 1910 in what is today Skopje, Macedonia. At the age of 12, she began showing interest in the life of missionaries and felt that she was being called to a life of serving God. By the time she was 18 she had left home and joined the Sisters of Loreto, never to see her mother or sister again. Though based out of Ireland, the Sisters of Loreto had a mission in Calcutta, India, where Mother Teresa spent most of her life serving as a teacher and helping the poor. Upon taking her first vo ws as a nun in 1931, she chose the name Teresa after the patron saint of missionaries. The mod...

Understanding Job Analysis

Web Exercise: Understanding Job Analysis Week 3 Human Resources Management Professor Lawrence R. A. Prosper March 23, 2013 1. How easy was it to find the specific occupation you were looking for, and how comprehensive was the information provided about that occupation? I was immediately impressed by the O*NET Resource Center after opening the site. The design was smart and the site was easy to navigate despite the many choices available to explore. This is a great example of what a Government agency working with the business community and the actual workers from each occupation can accomplish.A wealth of useful information is presented to the public at no cost in an easy to use format. I was quickly able to locate information that was specific to my chosen occupation. My current job title is Special Projects Manager which is a hybrid description. My primary duties are to initiate the acquisition of production machinery and when needed, additional building space to install the equipme nt; that is the Project Manager role. I also ideate and participate in projects related to safety, facilities management and production flows which justifies the Special Projects designation.I selected Project Manager in my search and was directed to the page for Architectural & Engineering Managers which gave a brief description of similar titles (Project Engineer, Project Engineering Manager), what these managers do, and what they would be expected to do on the job. The last item listed some on the job duties as to direct, review, or approve project design changes and to confer with management, production, or marketing staff to discuss project specifications or procedures: basically , my assigned duties.Following the link to Advanced Manufacturing, I was able to see examples of descriptive information about specific jobs. This page had a graphic of a sample career Ladder/Lattice for Advanced Manufacturing which was very similar to my actual career path. The job titles were a bit d ifferent but did show a familiar progression from helper, to operator, to production supervisor, to engineering/production manager. This was my path to my current position but I made it here without a college degree, a feat that would be impossible in this company today.I maneuvered to the Engineering Manager page and found more job specific information. A good amount of detail was devoted to the Job Description and some mention of the required education, workforce preparation, work experience, licensure/certifications, salary and the employment outlook for the next 10 years. The information for this occupation was easy to read and comprehensive. As someone who is presently in this field I can say the duties and expectations presented are realistic. For a person considering pursuing a career in this area a path can be established to achieve that goal by using this resource as a guide.What did you think of the occupations O*NET suggested as matching your skills? Was the occupation yo u are in or preparing for among those listed? This exercise has confirmed that I have ended up in an occupation that suits my skill sets, abilities and personality. The non-scientific results earned on the Interest Profiler test were also quite representative of me as a person and the specific area scores did indicate an affinity for my chosen field. My chosen occupation is Project Manager and this was among the professions listed.I continue to prepare for this occupation by attending college to complete my degree despite having worked at my company for 29 years. A Project Manager works alone while being involved with coordinating the work of many unconnected groups simultaneously. It can be a demanding profession and may not provide satisfaction to certain personalities. The skills detailed on the O*Net are well defined and can be interpreted as needing one to be technically knowledgeable, have good people skills, and to be adaptable to changes in the scope of a project.Math skills are important in the product design and for producing the cost analyses and project justifications. I recently completed algebra and statistics which the job description notes as necessary. Character skills are described as needing attention to detail, integrity, adaptability, analytical thinking, dependability and stress tolerance. I match up well in those areas and at times tend to overdo the attention to detail. Problem solving skills are used to notice a problem and figure out the best way to solve it. This is a difficult skill to master and sometimes the logical solution is not the best choice as a solution.Finally, there are project management software tools available and learning to use them benefits the project and the teams involved in the work progression. You can also contact them to tell them your computer has died and you want to use the program on your new computer. They are the ones to reset the activation counts. Just explain what has happened. NP124865399 2. As an HR professional, how could O*NET be useful in conducting a job analysis? Explain specifically how you would use the data from this site to assist your organization. 3. As a director of human resources, would you have your staff use this site? Why or why not?