If money is an issue, we’ll figure something out. Describe the structure of fatty acids and explain how saturated, monounsaturated, and polyunsaturated fatty acid structures differ from one another. In the late 80’s for example, scientists made a breakthrough in using X-Ray Crystallography to produce the structure of HIV Protease, an enzyme that was vital to the retrovirus’ life cycle. I’ve put a new and improved set of instructions at http://wp.me/p4ZH0M-7k (though the recipe is the same). In other words, the substrate and product of the reaction are isomers. Determine the number of moles of water produced when one mole of NH3 reacts according to the balanced reaction shown. Thanks for all the help. Hello, I have used ‘Six Steps to Wonderful Graphs’ in the past in my class room with great success. ❤. haha! I am trying to cobble together a chemistry class for my homeschool son. Concordia University My co-teacher and I had to build an 8th grade (high school credit) chemistry and physics class from scratch. In the reaction 2 C + O2 2 CO, how many moles of carbon are needed to produce 66.0 g of carbon monoxide? Hail and praises to Mr. Guch! You’ll stick around for at least another 15 until I retire, right? How do you pronounce your name? Mr. Guch, I am a teacher and I have been using your website for years. Keep on truckin’! Discover the many ways in which drugs can affect the brain and brain chemistry. The molecular weight of PCl3 is ________ amu. How many moles is this? How do you pronounce your name? During the first Match Day celebration of its kind, the UCSF School of Medicine class of 2020 logged onto their computers the morning of Friday, March 20 to be greeted by a video from Catherine Lucey, MD, MACP, Executive Vice Dean and Vice Dean for Medical Education. I’m not sure what’s happened, but I’ve fixed things up considerably. 42.0 g Cl2 contains ________ molecules Cl2. 3.342 x 10^20 molecules. Is it g-OO-ch or g-uhh-ch? Dear Mr. Guch Thanks in advance. Chapter 8 Lecture Notes Lipids 1 Chapter 8 Lecture Notes: Lipids Educational Goals 1. How many moles of calcium carbonate are contained in a tablet weighing 550. mg? berghmary@yahoo.com. It’s wonderful to have quality sites for us and our students. If 4.65 moles of propane, C3H8, are burned in a grilling session, how many moles of carbon dioxide gas are formed? Montreal, Canada. Thank you for providing all of these valuable resources and for being one of my top “go to” spots for Chemistry! We here at the Cavalcade o' Chemistry regularly donate to the Free Software Foundation and the Wikimedia Foundation. You saved my butt so many times during my first year teaching a high school chemistry! What an amazing site. 2 mol N, 8 mol H, 1 mol C, and 3 mol O. If you need personal help with your chemistry,… Carbon tetrabromide b. Sulfur dioxide ... How many moles of atoms of each element are there in one mole of (NH₄)₂CO₃? Step 7: Switching gears to gases Thanks for all of it! How many grams of C will be consumed when 5.00 grams of Na2SO4 react according to the balanced reaction shown? Carbon dioxide (CO 2) is one of the few examples. Your advice to kids, parents and teachers is spot on. Change ), You are commenting using your Facebook account. Thanks! ( Log Out /  Anjali. Celebrating 20 years of chemistry goodness. So thanks again Mr. Guch, I appreciate you SO very much. Hi Dr. Guch! Many advances in drug discovery and medicine are due in large part by X-Ray Crystallography by identifying drug targets in many diseases that thrive today. If that email turns into something that looks like a blog post, I’d sure like to read it some day. (B) Chignolin protein, represented by the sequence of amino acids (left) and positions of carbon- atoms (right) which are shown in Which statement concerning the mole is not correct? Any time Milo and crew want to come by, they’re always welcome. How many moles of CO2 are produced when 2.5 moles of O2 react according to the following equation? This section also covers the mechanism of addition to the double bond and introduces addition polymers, which are commercially important and have many uses in modern society. Organic chemistry is a branch of chemistry that studies the structure, properties and reactions of organic compounds, which contain carbon in covalent bonding. I found a mistake on your answer key to Balancing Equations Worksheet, Part 2. Between 1897 and 1906, J. J. Thomson, the discoverer of the electron, proposed three equivalent electrons between each pair of carbon atoms in benzene. In the reaction shown, what is the mole ratio that would be used to determine the number of moles. How many atoms are present in the diamond? Very impressed with the changes!! I wish. The number of grams in 0.350 mol of Na is ________. Typo; Should read hydrogen atoms together is 2.0. Of course, you realize that if you win a Nobel Prize, I’m going to expect a shout-out! BTW, the web site keeps getting better and better — particularly since (young) Steve has been getting involved. Spent too much time here not to support. It has been found to treat prescription drug overdoses, as well as overdoses of over-the-counter medications like aspirin, acetaminophen and sedatives (13, 14). Which statement concerning the mole concept is not true? phenol [fe´nol] 1. an extremely poisonous compound, used in dilute solution as an antimicrobial, anesthetic, and antipruritic. When 450. g of hydrogen was reacted with nitrogen, 1575 g of ammonia were produced. If you’re interested in adding an alternative vegetarian chili recipe, I can recommend one that’s first-rate based on a sampling of two: your Mom and Dad. Now I am in my third year and it will be in Sweden. My teacher is ruthless. I’m so happy to have found this site. Do you still have this as an active link? Convert grams C9H8O4 to moles or moles C9H8O4 to grams. If you need personal help with your chemistry, I’m also available to tutor you either via email or through Zoom. Please keep up the great work for your students with my thanks in mind. Any suggestions you can provide would be greatly appreciated. From my first oil spill lab to buying your “For Dummies” tome, it’s been a grand ride! Given that the molar mass of hydrogen is 1.0 g/mol (check out the periodic table), the mass of both oxygen atoms together is 2.0 grams. A solution containing 145.0 g AgNO3 is mixed with a CaCl2 solution and 98.4 of AgCl is recovered. ribonucleic acid: (RNA) [ ri″bo-noo-kle´ik ] a nucleic acid that is present in all living cells and controls cellular protein synthesis; it replaces deoxyribonucleic acid (DNA) as a carrier of genetic codes in some viruses. Even though COVID is still a thing and many of you are going to school in your living room, this site is still around and totally free. The combustion of propane gas (C3H8) is used to fuel barbeque grills. Carbon and hydrogen do not have the same electronegativity but are similar; thus, nonpolar bonds form. With over 68 questions, this quiz will test your knowledge of some of the fundamental topics of the subject. Thanks very much. All the questions in this questionnaire are multiple-choice, meaning you have one correct answer to hit for among four options. The chain of carbon atoms holds as many hydrogen atoms as possible — it's saturated with hydrogens. In this single water molecule, there are two atoms of hydrogen. A student weighed 0.550 g of lithium chloride, LiCl, to use in a reaction. Thanks! How many moles of NaHCO3 are present in a 2.00 g sample? Seriously, we've been around for 20 years! at STP., except maybe on Venus or Mercury.. Hi. Carbon has four electrons in its outermost shell and needs four more to fill it. If you’ve got chemistry questions, take a look at the stuff that’s up here and get the assistance you need. An … Tonight I found this website on a practice exam we were given in class and in literally 5 minutes I had mastered the process. Phenol, any of a family of organic compounds characterized by a hydroxyl group attached to a carbon atom that is part of an aromatic ring. I’ve loved it for years, but never bothered to print it out. What mass of CO2 will be produced when 125 g of C8H18 react completely in the following equation? Change ), You are commenting using your Google account. The formula mass of copper(II) chloride is ________ g. The formula weight of Al2(SO4)3 is ________ grams. ... How many molecule of aspirin, C₉H₈O₄, are there in a 100.0 mg tablet of aspirin? I truly feel that I owe a lot of my success to you, you are one of my chem-heroes! How much Ca(NO3)2 should be weighed out to have 0.650 mol? Gabi Mandl It is also effective for opium or cocaine overdose. What is the percent yield if the, In a reaction to produce chlorine gas, the theoretical yield is 25.6g. As a first-year Chem teacher, I seriously can’t thank you enough for making this bounty of resources freely available. wonderful that you have chosen to teach chemistry to all those who are interested. I will, by the end of the afternoon, make sure that the problem you mentioned is fixed. Thank you. Who said Chemistry teachers are nerds? There are Hydrogen atoms bonded to some of the carbon molecules as well, but these are not shown for the sake of simplicity. WOW!!! I have also been TA-ing general chemistry for three years now, and I have referred well over two thousand students to your website. Is is g-OO-ch or g-uhh-ch? Please log in using one of these methods to post your comment: You are commenting using your WordPress.com account. Thanks for your message! Petrochemical, in the strictest sense, any of a large group of chemicals (as distinct from fuels) derived from petroleum and natural gas and used for a variety of commercial purposes. If a tablet of acetaminophen, C8H9NO2, weighs 324 mg, how many moles are there in the tablet? The fuel for your car is a mixture of octane and several other hydrocarbons. Water is NOT a gas at STP, and your quantity of water has a volume of approx. In the reaction shown, how many moles of HCl are needed to react with 2.4 moles of Al? What is the percent yield of this. Post-translational modification of target proteins by PRMTs plays an important regulatory role in many biological processes, whereby PRMTs methylate arginine residues by transferring methyl groups from S-adenosyl-L-methionine to terminal guanidino nitrogen atoms. In this example we’re at STP, so we’ll just continue the calculation above using “22.4 L” as our conversion factor: Love the upgrade and can’t wait to see what else is coming! For more information about this license and how it affects how you can use the contents of this site, visit http://creativecommons.org . Seeing your chili recipe and your nitric acid story has truly made my day and inspired me. Even though COVID is still a thing and many of you are going to school in your living room, this site is still around and totally free. My wife says that I remind her of Pickles the drummer, which isn't much of an endorsement. - Quora, https://chemfiesta.org/2014/11/03/mr-guchs-chili-recipe/, https://chemfiesta.org/2018/11/09/worksheets-2/. Study of structure determines their chemical composition and formula.Study of properties includes physical and chemical properties, and evaluation of chemical reactivity to understand their behavior. I love your site, can you recommend a good text book or other primary source to be used along with it? I have used worksheets from your website for years and sent my students there for additional practice as well. I have been teaching jr high science for over ten years and chemfiesta has been in my lesson plans since the day I found it. Ammonium sulfate is a common component of fertilizer. Thanks! Weirdly enough, I found that in about the middle of 2018 the worksheets disappeared off of the page sidebar as well, so they’re up there, too. An engagement ring contains a diamond weighing 1.25 carats (1 carat = 200 mg). Thanks so much for spreading the love with these resources. I’ll email you with some thoughts. The Haber process is used to make ammonia, which is an important source of nitrogen that can be. The following equation represents the formation of nitrogen dioxide, a major component of smog, Which is the limiting reactant when 3.00 g of calcium are reacted with 8.00 g of water to produce hydrogen, The percentage yield of a reaction can best be described as the ________ times 100%, amount of product obtained divided by the maximum possible amount of product, The reaction N2 + 3 H2 2 NH3 is used to produce ammonia. Besides serving as the generic name for the entire family, the term phenol is also the specific name for its simplest member, monohydroxybenzene, also known as benzenol. I’m glad you like the site and my advice. We’ve tried one curriculum so far but it’s quite dull and I”m losing him fast. I took AP chemistry and it was thanks to you that I learned how to balance equations! Hydrolysis involves the reaction of an organic chemical with water to form two or more new substances and usually means the cleavage of chemical bonds by the addition of water. The number of moles of H2O is. I just wanted to say thanks. Aloha. I’ve just discovered your website and think it’s great. In the balanced reaction shown, the mole ratio of Fe2S3 to O2 is. vinaka and thank you once again for your greatest help …..now i came to understand this clearly…. Thank you very much, your worksheets are awesome! An explanation for the exceptional stability of benzene is conventionally attributed to Sir Robert Robinson , who was apparently the first (in 1925) [9] to coin the term aromatic sextet as a group of six electrons that resists disruption. The graphing stuff is on the new and improved chemfiesta.com at https://chemfiesta.wordpress.com/2014/09/17/drawing-good-graphs/ . You’re not serious about your gas stoichiometric question on water are you? In contrast, only a handful of inorganic compounds contain carbon atoms. thanks Mister Guch I have been using your online worksheets whenever I have chemistry. (The weather is getting colder and a bowl of Mr. Guch’s Chili sounds awfully good.) https://chemfiesta.wordpress.com/2015/03/26/gases-and-their-laws/, https://chemfiesta.wordpress.com/2014/09/17/drawing-good-graphs/, What are some good books for self-studying chemistry? You are THE MAN! 3. A diet rich in saturated fats can drive up total cholesterol, and tip the balance toward more harmful LDL cholesterol, which prompts blockages to form in arteries in the heart and elsewhere in the body. In many cases, charcoal is used in emergency situations for ridding poisons from the body (like drug overdoses). thank you for sharing. A mole of any compound contains one mole of each kind of atom found in that compound. I’m glad you pointed this out to me because it’s a perfect example of how two important things: So I miss not teaching high school chem alrady (new school this year), but still listen to the Descendents and wonder if they actually used to show up and raid your apricot stash? Thank you so much, Hi, Guch! The non-redox titration Questions. You make me more efficient and effective , I have been struggling with trying to figure out the rationale behind how to correctly use the roman numerals when naming a compound all semester. Contact me at misterguch@chemfiesta.com for rates. Your site is my go-to for student practice work on days that I’m unexpectedly sick and need to get something to my sub ASAP. Wow! The molar mass of butane, C4H10, is ________ grams. - Quora. You’re awesome! A great many inorganic compounds do contain hydrogen atoms, such as water (H 2 O) and the hydrochloric acid (HCl) produced by your stomach. 2) The best way to fix problems is to get the input of others. I totally forgot! How many molecules are present in 3.25 mol of C2H6O? Change ), You are commenting using your Twitter account. How many carbon atoms were present in the stone I can’t thank you enough! Don’t tell anybody, though! I keep trying to click the “miscellaneous worksheets” link under the “worksheets” tab and it routes me to a page with an orange box, but I click the orange box and the cycle just starts over…wheres da worksheets?! Would love to take a peek! Compounds which contain carbon-nitrogen single bonds are called amines, and may be thought of as organic derivatives of ammonia (with carbon groups replacing the hydrogen atoms). 105 g of MgCl2 contains ________ mol MgCl2. It weighed 3104 carats (1 carat = 200 mg). I never realized until now that I was able to actually leave you a comment! I appreciate your kindness and generosity! Enjoy! A) A mole of a diatomic element contains 2 × NA moles of atoms of the element. I also donate to the Linux Mint project and toward hosting Puppy Linux whenever I remember. I can no longer access it, but was redirected to this site. Diamond is one form of elemental carbon. I’ve been “with” you since my first year of teaching 15 years ago. BTW, it’s awesome to see what you’re doing here! The resources on this site were written between 1998 and 2018 by Ian Guch and are copyrighted. ( Log Out /  And thanks for all you share! Acid rain forms in the upper atmosphere by the reaction of sulfur trioxide with water forming. Dr. James G. Speight, in Environmental Organic Chemistry for Engineers, 2017 3.6.12 Hydrolysis. B) The number of atoms in one mole of platinum is the same as the number of atoms in one mole of uranium. Fast forward to now, I have graduated with a BSc. ( Log Out /  Amines are weakly basic, and are present in many pharmaceutical compounds, often … The link to your Partial Pressures worksheet isn’t working. It obtains these four from four hydrogen atoms, each atom providing one, making a stable outer shell of eight electrons. I just saw this post and have fixed the problem you mentioned. Thank you! My kids LOVE when they get “GUCH worksheets”! The new worksheets page is up at (https://chemfiesta.org/2018/11/09/worksheets-2/) and it has all of the worksheets on the site listed. ( Log Out /  Hoffman prepares aspirin 1880 : configuration of optical isomers Miescher discovers DNA Mendeleev's periodic table: 1860 : Kekule structural formulas Perkin synthesizes mauve Pasteur resolves (±)-tartaric acid Goodyear vulcanizes rubber: 1840 : Wohler synthesizes urea Faraday discovers benzene 1820 : Avogadro's law Dalton's atomic theory 1800 Aspirin, represented by the molecular graph (left) and 3D configuration (right). The disclaimer is simple: If you use anything on this site or linked to from this site, do so at your own risk. One mole of solid tetraphosphorus decaoxide reacts with six moles of liquid water to produce. Just call me ‘grateful college girl’. The number of grams in 7.00 moles of N2 is. I’m glad that my resources have helped in your march toward chemistry awesomeness. With luck I’ll pass another test tomorrow. (a) write the equation for the titration reaction. Molecular weight calculation: 12.0107*9 + 1.00794*8 + 15.9994*4 The definition, however, has been broadened to include the whole range of aliphatic, aromatic, and naphthenic It’s only through comments like yours that I know there’s a problem. Came here for stoichiometry calculations help. If you've got chemistry questions, take a look at the stuff that's up here and get the assistance you need. Please email me if I am incorrect. Molar mass of C9H8O4 = 180.15742 g/mol This compound is also known as Aspirin.. You’ve helped me explain things so many times! 1) I can screw up like anybody else. You obviously know your science, but even better you appear to ENJOY it. Thanks for such a great website for chemistry and chem resources. Is saturated fat bad for you? 2. I just wanted to say thank you so very much for taking the time to build this beautiful repository of chemistry help!