Calculating Percent Yield in Chemistry

Calculating Percent Yield in ChemistryCalculating percent yield in chemistry is the process of determining the mass ratio of two molecules. It involves the use of mass units such as grams, liters and kilograms in analyzing certain chemical mixtures. The purpose of this is to determine the molecular masses that will give a specific reaction mixture that will yield the desired result.Comparing one percent yield with another or a comparable reaction is a common way to determine whether a reaction yields a product that is the desired one. This can be done by determining the mass ratio of the two molecules. It is also used in pharmaceutical chemistry to compare the molecular masses to see if the target mass is within the permissible concentration.Knowing the molecular mass ratio of two molecules of the same chemical is also useful for simple comparisons. In the case of tests for firefighting applications, the molecular mass may need to be compared to determine if a batch of water containi ng oil is sufficient to extinguish a burning building. These mass ratios are also commonly used to determine the proper concentration of disinfectants for domestic applications such as washing clothes, swimming pools, etc. Such a compound needs to be made up of the correct concentration of the chemical.The molecular mass ratio are essential tools in the laboratory because it is the mass ratio that provides the capacity to perform calculations on the reactions. These calculations will give a comprehensive overview of the reaction. Calculating percent yield in chemistry is really the most important step in doing reactions since all other steps are dependent on it.The mass ratio of the two molecules is usually calculated using formulas based on a mole fraction of the compounds. To compute a mass ratio, you divide the total mass of the two molecules by the sum of their masses. This gives the fractional mass ratio.Toget an exact calculation of the mass ratio, you need to use formulas tha t have been derived from the unit's theoretical value. The formula that you use will depend on the chemical to be studied and the expected reaction products. Mass ratios are calculated based on atomic weight, molecular weight, etc. The formula is usually dependent on the chemical being studied and the molar concentration.If the reaction is intended to burn the polymer (polyester) of the polymerase enzyme, you can use the formula for calculating the mass ratio of a molecule of polyester to the molecular mass of the enzyme. Using this method, it will provide an accurate estimate of the size of the polymerization zone and the formation of ice and thus delay the polymerization reaction.

English Idioms related to Dreams - English Lesson via Skype

English Idioms related to Dreams - English Lesson via Skype Here you will learn useful English idioms related to dreams.You will also learn the meaning of DREAM ON English expression. Scroll down to watch a short video lesson. English Idioms about Dreams We all have dreams. Some come true and someWell, they just remain as dreams. Here are  some English idioms related to dreams with an appropriate explanation.More  often than not (on a regular basis) we dream at night while we are asleep but sometimes, time permitting, we might look out of the window or stare into space (focus on one thing) and daydream. English Idioms related to Dreams BEYOND YOUR WILDEST DREAMS This occurs when something you wished for actually comes  true but in an even bigger or better way than you could have possibly imagined.Example: David was good at football infact very good. He hoped that one day he might in fact be a professional player. Out of the blue he got a letter inviting him for a trial with one of the biggest teams in the country it was more than he could wished for. It was beyond his wildest dreams.A DREAM COME TRUEAs indicated we all or most of us dream. Sometimes they become reality and when they do we will often be heard saying ah it is like a dream come true. Something that someone has required or attained after a long time.Example: Sara retired early from her work as a teacher as she wanted time to travel and see the world. Imagine her surprise when she logged on to the internet and saw an offer to travel around the world with a family and teach the children as they travelled. For her it was a dream come true. She would be ab le to travel and get paid at the same time. English Idioms related to Dreams WORKS LIKE A DREAMWhen something may be broken and in need of repair you are very surprised and delighted that it then works better than ever once the repair has been carried out.Example: Fiona was delighted when her favourite watch was repaired. Her boyfriend asked her how it was now that it had been repaired. Its perfect she replied. It works like a dream.Of course dreams may not always turn into reality and we can also use some English idioms related to dreams in a less than positive way:DREAM ON!We use this idiom when we might wish to bring someone back down to earth. Young people dream a lot and have very high expectations. So when they perhaps are dreaming a little too much we might tell them it is unlikely to happen and that they should dream on!.Example: Mary’s son had dreams of playing for Real Madrid, driving a Ferrari car and living in a mansion. Mary admired his ambition but it was all a bit of fantasy. When he spoke about it as he often did she would keep his feet on t he groundby saying but you don’t play for a team now and you cannot speak Spanish! Dream on, its never going to happen. DREAM ON Meaning IN YOUR DREAMS! Similar to dream on we often use this phrase to burst someone’s  balloon. This usually happens when someone is really dreaming about  something that is very unlikely to happen if in fact at all.Example: John dreamt* about winning the Lotto buying an expensive car retiring from work and living a life of luxury. His wife was a little more practicaland reminded him that the odds of winning the Lotto were something like 4 million to 1, almost impossible. In your dreams John, I am afraid only in your dreams!!* We can use either  dreamed or dreamt in the Past Tense English Vocabulary List Out of the blue   unexpectedlyTrial   testTo carry out   to doTo burst someone’s  balloon/bubble   to spoil their dreamTo keep someones feet on the ground = to bring someone back down to  earth   to return someone to realityLife of luxury    very wealthy life styleThe odds   chancesPractical   realistic English Idioms related to Dreams

8tracks The Moodiest Music Site on the Web

8tracks The Moodiest Music Site on the Web Photo from theletter.co.uk Welcome to 8tracks. The self-proclaimed [h]andcrafted internet radio site, named the Best Website of 2011 by Time Magazine,  uses a tagging system for its user-created playlists. When you search for that summer + hipster mix, every playlist that has been tagged with those two words will come up. Each mix has at least 8 tracks to it, but can have many more than that, and will always have a wide variety of music on each.  On 8tracks, users can listen to or create mixes. It is great for sharing mixes with your friends, but also with perfect strangers. If youve created a study mix that works well for you, post it to 8tracks and let it help someone else in their study-stress!  Not in the  mood? Search for an artist or genre and let 8tracks work its magic. Though 8tracks doesnt always offer the perfect selection of music, because, of course, we all have different tastes from one another, its fairly spot on most of the time. My only complaints would be that  as a listener, you cannot skip more than 3 songs per mix in one hour before having to go to the next one and you cannot go back to a song after its played. Some of the mixtape art is a little risqué as well, so in a more professional setting, its hard to find mixes to listen to. Thankfully, there is a setting that you can put on called Safe Browse that will skip over tracks and playlists that are inappropriate. Other great features include the Youtube and iTunes buttons on the bottom of each mix. If youve found a new song that you really like, you can find where to buy it or listen to it again on using these links. Want to take 8tracks on the go? There are free Android  and iPhone  apps available, which have both had recent updates with great reviews. For those of you who are looking for more out of this site (mostly just DJs) there is 8tracks plus. This upgraded version of the site includes an ad-free site and several DJ-focused features that are to be released soon. The cost is $25 for a 6-month subscription and 14-free trial. I wouldnt say its worth it, because unlike  Pandora,  the ads are simply non-audio sidebars, so for a regular listener, the upgraded version does not offer much. Simply listen away with the free version! What moods do you use 8tracks for?

Edukwest Talking with Kirsten Winkler about italki

Edukwest Talking with Kirsten Winkler about italki If you dont know who Kirsten Winkler is, you really should. She is a professional language teacher who has become an expert in the field of online language education. Between her blog and her E-Teachers Academy and conferences, I think there are few people who understand the evolving space of online language education as well as she does. You could say Kirsten is the equivalent of techcrunch for online language learning. One of her main projects is called Edukwest, and she has been interviewing a lot of inspiring people in the online language learning space. She asked to interview us at italki, and we gladly took the opportunity. Heres the direct page to the interview http://www.edukwest.com/kevin-chen-of-italki-com/ And heres that interview embedded (youll need a proxy to view it if youre in China): We covered a lot of topics in the interview, and one thing we hope that is clear is that it is an exciting time to be a startup in this area. The technology and the market is evolving very quickly, and were only just seeing the start of these new and potentially world-changing ideas. I believe everyone shares this core belief that technology can play a critical role in improving the old way of language learning. The impressive thing about Kirsten is that she has actually met and interviewed a lot of these people! Again, if you want to know all the latest news, as well as engage in the latest debates about online language education, read Kirstens blog or follow her on twitter (@kirstenwinkler). And of course, you can also get involved and influence the shape of things to come just by commenting on a blog or sending emails! Edukwest Talking with Kirsten Winkler about italki If you dont know who Kirsten Winkler is, you really should. She is a professional language teacher who has become an expert in the field of online language education. Between her blog and her E-Teachers Academy and conferences, I think there are few people who understand the evolving space of online language education as well as she does. You could say Kirsten is the equivalent of techcrunch for online language learning. One of her main projects is called Edukwest, and she has been interviewing a lot of inspiring people in the online language learning space. She asked to interview us at italki, and we gladly took the opportunity. Heres the direct page to the interview http://www.edukwest.com/kevin-chen-of-italki-com/ And heres that interview embedded (youll need a proxy to view it if youre in China): We covered a lot of topics in the interview, and one thing we hope that is clear is that it is an exciting time to be a startup in this area. The technology and the market is evolving very quickly, and were only just seeing the start of these new and potentially world-changing ideas. I believe everyone shares this core belief that technology can play a critical role in improving the old way of language learning. The impressive thing about Kirsten is that she has actually met and interviewed a lot of these people! Again, if you want to know all the latest news, as well as engage in the latest debates about online language education, read Kirstens blog or follow her on twitter (@kirstenwinkler). And of course, you can also get involved and influence the shape of things to come just by commenting on a blog or sending emails!

What Its Like Being Happy

What It's Like Being Happy Photo by natalieecollins via Instagram. My friends, family, random acquaintances, and even those I’m not particularly fond of are able to tell. They know that I’m happy. Some of them say that they’re genuinely excited for me, when I know that they’re not. Several seem almost mad about it. That’s jealously and selfishness, and you can’t really expect more from people, I’m afraid. Some could care less. Others seem legitimately pleased and tell me things like “If anyone deserves this, it’s you”, or “I’m so glad things are finally turning around for you”. I like when they’re able to feel happy from my happiness. Genuine happiness can’t be taken away from you either; you can only spread the disease to more and more people. I can’t even begin to describe you what happiness has done for my overall health. My long list of prescriptions is starting to dwindle down; you’re more likely to find me outside in the sun than in bed hiding under my covers; I notice myself being comfortable with complete strangers, and because of this, I’ve made more friends in a few weeks then I did in a whole semester. I’m a more thoughtful and compassionate person, acquaintance, best friend, sister, daughter than usual. Instead of being consumed with my struggles and shortcomings, I try to help others see the brighter side of their own. I’m basically Mother Teresa these days. Your question is probably the same as mine â€"  how the hell did this happen? How can I achieve this blissful emotion you speak of? I wish I knew the answer. Part of me believes in karma, not that I’ve had a particularly tragic life that’s rewarded me with this period of peace. Another part of me thinks that whatever medication I’m on is really working this time. The spiritual side of me has determined that I’ve always been happy, and it just took a bit of digging and uncovering to find it. Whatever the case may be, the whole of me knows that if this isn’t nice, I don’t know what is.

5 Ways to Keep Self-Esteem High During Summer School

5 Ways to Keep Self-Esteem High During Summer School Costa Mesa Tutor Tips: 5 Ways to Keep Self-Esteem High During Summer School Many children can benefit from an academically focused summer school program that will make their overall educational experience easier and more productive. Unfortunately, most children dont see summer school as a benefit. Rather, they see it as something they have to do because they didnt receive passing grades during the year. There are several things parents and teachers can do to help younger kids keep their self-esteem high while they attend a summer school program. Of course, every child is unique, and their situations will vary from that of their peers and neighbors, but there are several positive things about summer school in general. 1. Become an expert Kids who fell behind in a difficult subject during the school year may not be feeling great about their abilities to become an expert. However, participating in a summer school program can help kids improve in that same subject during the next school year. Summer school provides an opportunity for kids to focus on just that one subject that gave them trouble so they can overcome any content or study skills issues. Once students have a chance to understand truly whats going on with reading, math, or any other challenging subject their self-esteem is likely to get higher (READ: 10 reasons you need a summer tutor). 2. Leave academic struggles behind In many cases, children attend summer school because they are having some overall academic struggles as opposed to difficulty in a specific subject. If this is the case, the summer school instructor may focus on study skills and organization across all topics. Kids dont get a chance to take a class in study skills but are expected to master these things on their own. This can make it very difficult for kids with any concentration or motivation issue to ace every class. Academic summer programs provide a great opportunity for kids to work with a dedicated teacher and develop some study skills that work for them as an individual. 3. Work with a private Costa Mesa tutor in a one-on-one setting Another thing students can do to help keep their self-esteem high during summer school is to work one-on-one with a private tutor. Many kids struggle with either reading or math and need a little bit of extra help. A private tutor can serve as an excellent supplement to a summer school program because they can provide useful repetition of a challenging subject and introduce new concepts at a pace that works for the student. When a student isnt overly stressed out about a particular subject theyre more likely to feel great about the subject and school in general. 4. Allow time for fun activities Many kids dont like summer school because they think it will take time away from fun activities and time with friends. If a child can benefit from summer school, they should attend, but they should also have plenty of fun activities scheduled, so they dont miss out on some relaxation and outdoor time. If kids know that theyre going to have plenty of time to have fun with friends in the neighborhood they will be more likely to give summer school a chance and concentrate on improving their academic skills. 5. Prevent isolation A lot of the time, students feel isolated if they have to attend summer school. However, there are tons of kids attending summer academic programs these days. With increased competition, many students simply attend summer school to get ahead. They may want to apply for a scholarship later on or participate in academic competitions. If children know that there are tons of students attending summer programs, they are less likely to feel isolated. As long as theyre part of a group, summer school wont seem so bad (READ: 5 Reasons to get an in-home tutor this summer). Do well in summer school with the help of Costa Mesa private tutoring from TutorNerds. Call us today for more information. All blog entries, with the exception of guest bloggers, are written by Tutor Nerds. Are you an education professional? If so, email us at pr@tutornerds.com for guest blogging and collaborations. We want to make this the best free education resource in SoCal, so feel free to suggest what you would like to see us write.

How to Tutor ESL Students

How to Tutor ESL StudentsIf you are interested in finding out how to tutor ESL students, this article can give you some very helpful information on how to do this effectively. Many people in the UK simply do not know how to do this and therefore have a hard time.When speaking to people about how to tutor ESL students, the most important thing you need to realise is that ESL (English as a second language) is a separate language altogether. If you speak fluent English, then you can easily teach the students in your class English as a second language. However, this only works for those who speak English as a first language. If they are all learning English as a second language, then this doesn't work very well.You should also realise that English is used by most people to communicate every day and is actually easier to learn than other languages like French, Spanish or Italian. However, you can get a lot more out of it than people who only speak one language.Another great way to teach E SL students is to find some books on the subject. You should look online for resources that will teach you how to teach ESL students and actually help you learn all of the skills that are needed. Remember that it is not the language that is important, but the ability to communicate with people who don't speak English.The number one tip on how to tutor ESL students is to use the internet. There are some really good online resources that will provide you with materials, to teach ESL, and you can get a lot of great information from these resources.In addition to using the internet, you should also consider going to your local library. This is an excellent resource that will offer you books that you can buy and use in your classes.When you find out how to tutor ESL students, make sure that you keep in mind that you want to be effective, but don't waste too much time. That means that you will want to avoid going into depth too quickly, and allow them to get familiar with the material tha t you teach them.

Choosing an Organic Chemistry Tutor For Kent State

Choosing an Organic Chemistry Tutor For Kent StateIf you're in the market for an organic chemistry tutor for Kent State, you'll be happy to know that there are options to consider. An online chemistry tutor is one option, especially if you don't live near a university that offers this type of education. However, if you live in the area and would like to pursue a degree in chemistry or biology at Kent State, there are several options available to you.The most obvious option is an online chemistry tutor. These individuals have the advantage of having the ability to interact with students and help them learn new concepts. As an individual who has no choice but to be at a school where an organic chemistry tutor is required, this is the best option. Since these tutors are only in the area, they are able to provide some of the most useful instruction you will ever have.For those who are already attending classes on campus, there are also options. If you are a biology student who wishes to specialize in organic chemistry, you may need to take classes outside of your major. In this case, it is advisable to consider an online chemistry tutor.Students who wish to take classes outside of their major can also consider taking a course online. An online chemistry tutor will be able to help you achieve your goal by helping you complete and understand all the coursework. For more flexibility, it is also important to consider an online organic chemistry tutor since you will no longer have to face the constraints of a strict schedule.Those who wish to take classes in other areas, such as general education courses, should consider taking a course online as well. An online chemistry tutor can help you do this by setting up a flexible schedule. Of course, you will still need to make sure that you are registered for classes at Kent State University, but this allows you to study at your own pace.If you are an out-of-state student who would like to take classes at Kent State Universit y, there are also options. Some of these schools offer courses in organic chemistry, which are open to anyone regardless of their home state. If you choose to take a class online, the tutor will help you understand the material.No matter where you live, the opportunities available to you will be much greater when you choose to study at Kent State. If you take classes on campus, it can be hard to continue with your studies when you are unable to study at your normal schedule. By choosing to take an online chemistry tutor, you will be able to continue your studies at your own pace and plan ahead by allowing yourself the flexibility you need to learn.

What to Know About IB Exams

What to Know About IB Exams Many high schools offer International Baccalaureate (IB) programs instead of, or in addition to, Advanced Placement (AP) programs. What is the IB program and what is the IB exam format? Youmay be wondering if theres anything youre missingsure, youve put your time into exam prep, but what else? If youre nervous about test day, a little information can go a long way. When youre past the point of prepping for the test but not yet sitting down for it, your mind may wonder: What should you expect? Thanks to the thousands of students per year who have taken this test before you, theres information available! What should you know about IB exams? Internal and external IB assessments As you may know, International Baccalaureate exams are administered in two sectionsinternal assessments and external assessments. Your internal assessment will be completed by your teacher and may include presentations, written work, etc. When you take this test, your teacher will grade you, in addition to an appointed IB moderator. [RELATED: How to Mentally Prepare for Test Day] The IB external assessment includes questions that may consist of the following: Essays Structured problems Short answer questions Data interpretation questions Text-response questions Questions based on case studies Multiple-choice questions (used sparingly) External IB exam format The exams are administered to you over approximately three weeks in either May or November, with care to avoid overburdening students with too many tests at once. Students shouldnt have more than six hours of exams in one day and exams are rarely given on Friday afternoons. If you are ill or absent, you may be able to take the exam the day before or after instead with authorization from the IB Assessment Centre. The IB program consists of six core academic areas, as shown in the table below: IB core academic area Related Courses Group 1: Language The student's first language, e.g., English for students in the U.S. Group 2: Second Language A foreign language Group 3: Individuals And Societies Economics, geography, history, philosophy, psychology, anthropology, business, information technology Group 4: Experimental Sciences biology, chemistry, physics, environmental systems Group 5: Mathematics And Computer Science math and computer science related courses Group 6: The Arts visual arts, music, theatre arts How the IB exam is scored You will earn a grade between a one and a seven, seven being the highest. To earn your IB diploma, you need a total of 24 points. In addition to the test, you may also earn up to three points toward your diploma score by performing well on the theory of knowledge and extended essay components of your curriculum. Standard level and high level courses contribute the same amount of points to your overall score. [RELATED: What High School Students Should Know About IB Courses] The IB grading process Special care is given to select individuals to grade your exams who are consistent and objective throughout the process. Many of them are teachers within IB programs who are well acquainted with the subject and format. The program administrators give careful instructions and dismiss graders who dont meet requirements. This process takes place over several weeks and is fairly complicated. Following this time period, a final grade is awarded and released electronically to students. College credit for IB exams Because there is no official passing grade for IB exams, it is sometimes difficult to know whether or not you will receive college credit. Generally, the higher your score, the more likely you are to receive credit for your exam. Be sure to check with your potential colleges to get more specific information on how and when you might receive credit for your particular score. Best of luck during the IB exam weeks! Any topics you want to know more about? Let us know! The Varsity Tutors Blog editors love hearing your feedback and opinions. Feel free to email us atblog@varsitytutors.com.