Significant Figures Example Chemistry Problem

Significant Figures Example Chemistry Problem Here are three examples determining significant figures. When asked to find significant figures, remember and follow these simple rules: Any nonzero digit is significant.A zero between two nonzero digits is always significant.Trailing zeros are significant if they are at the end of a number and to the right of the decimal point.Leading zeros to the left of the first nonzero digit are not significant. For example, placeholder zeros in the number 0.005 are not significant (only the 5 is significant).If a number ends with a zero, but it is not to the right of a decimal point, it may or may not be significant. Generally, its safest to assume it is not significant. If you take a measurement where the final zero is significant, be sure to include the decimal point to make yourself clear. Significant Figure Example Problem Three students weigh an item using different scales. These are the values they report: a. 20.03 gb. 20.0 gc. 0.2003 kg How many significant figures should be assumed in each measurement? Solution a. 4.b. 3. The zero after the decimal point is significant because it indicates that the item was weighed to the nearest 0.1 g.c. 4. The zeros at the left are not significant. They are only present because the mass was written in kilograms rather than in grams. The values 20.03 g and 0.02003 kg represent the same quantities. Answer In addition to the solution presented above, be advised you can get the correct answers very quickly by expressing the masses in scientific (exponential) notation: 20.03 g 2.003 x 101 g (4 significant figures)20.0 g 2.00 x 101 g (3 significant figures)0.2003 kg 2.003 x 10-1 kg (4 significant figures)

Informative Essay Writing

Informative Essay Writing Informative Essay Writing Informative Essay Writing: How to Deal with Informative essay writing is a kind of writing, which aims to inform a reader about some specific matter with which he or she is not acquainted yet. While writing your informative essays you have to remember that your task is just to inform the readers objectively about some matter, without evaluating it or without inserting your own point of view at the subject. You have to be impartial during your informative essay writing: Writing Good Informative Essay In order to write good informative essays you have to ask yourself five journalistic questions before any word of informative essay writing. These journalistic questions help you to look at the problem from all the possible angles and to reveal the topic for 100 percent. If you are not acquainted with these journalistic questions, it is a high time for you to correct this mistake. Thus, the journalistic questions are as follow: Who? What? When? Where? Why? If you answer to all of them in your informative essay writing, you will manage to write excellent informative essays. Make these very journalistic questions to be a structure for your informative essay writing and you will present informative essays, which meet all the requirements from them and get the highest grade for your labour. Educate Your Readers Through Informative Essay While being engaged into informative essay writing, do not forget that your mission is to educate your readers somehow by presenting some interesting facts. That is why while dealing with the topic in your informative essay writing, remember that far not everyone is already acquainted with the matter of your informative essays. Try to explain the whole deepness of problem you are dealing with in your informative essay writing, before going into details and specifications in order the readers to be able to understand everything you write. Key Points To Include These are the main points your informative essay writing should reveal, do not neglect any of them as they will really help you to achieve a great result in your informative essay writing: explain something the majority of readers are not acquainted with; include the latest approaches to the topic you are dealing with in your informative essay writing; present all the existing approaches at the subject; present the problem of informative essays in general and after that fall into details; present several opposing points of view; cause-effect relations should be also analyzed within your informative essay writing. teach your audience how to use the knowledge it has received from you informative essay writing. Read more: Editing Essay Service Deforestation Essay Professional Editing Service Essay Example on Cause of Crime Stress Management Essay