Dc Nilbog

Good question, as I have just read over this prepared for tomorrow's Organic Chemistry test . n-R hydrocarbon iso-R hydrocarbon neo-R hydrocarbon Are the archaic equivalents of primary secondary tertiary hydrocarbons. I hope that helped Dc Nilbog

Hi again, I am writing a Chemistry report once again and I need some assistance from you. I am having trouble on answering some of the questions. Questions: 1) Why is acetylation of the amine group useful in organic synthesis? 2) Explain why the amine group and its acetylated derivative are ortho/para directors. 3) Aniline cannot be nitrated directly with the usual nitrating mixture of the nitric acid/sulphuric acid because considerable charring takes place. Write equations to show how you might prepare p-nitroaniline from aniline. I have searched around 'Google' but couldn't find anything. Thanks for your help. Dc Nilbog Problems solved. Thanks. Closed. Dc Nilbog

There's heaps of those mangroves where I live. New Zealand. I've been told that there are other type of extremopiles which lives near geothermal sulphur mud pools, we got that too. Forgot what they are called. Dc Nilbog

Thanks for the help YT2095. +rep to you. I did not explicitly explain the tiny details in my report, too much content for me to follow, I handed it in though. Dc Nilbog

I think; studying should be set priority on 3 things. Reading>Writing>Taking notes You cannot understand your own writing/copied from text unless you read and understand a concept. You cannot understand the notes you record in classes/or know the relevant material to record unless you understood it earlier on. The notes you take in the class will not make sense until you grasp the fundamentals of what you need to study. Notes that are put out in class for you to record are only a small percentage of the relevant material, plus a big percentage of the material which is irrrelevant and will worry you if you did not understood it. Dc Nilbog

Sorry I was meant to say: To determine Y> X = Y / 2 X*2 = Y Y = X*2 But hey, it's the first step that was important right? Dc Nilbog

Thanks for your response YT2095, you said: > conc sulphuric will create ethers,from alcohols, what is conc sulphuric acid known for doing to organic materials? Dehydration? Hmm... Sounds right. Thanks! >Some Grammar mistakes fixed. Thanks. Any clue about question 1? Thanks for your responses. Dc Nilbog

Hmm I am quite new to these forums too. I'll see what I can do. This 'particle' would normally represent an element. The number on the top is the Atomic number. The number at the bottom is the Mass number. Here is an example: 8 O 16 This element, Oxygen, has an atomic number of 8, mass number of 16. Atomic number: the number of proton OR electrons of an element Mass number: the number of proton AND the number of neutrons of an element. Tell me if I am being too specific or ask more questions if you need to, I hope this helped a bit. Dc Nilbog Also, I might add, I just remembered from previous years of science at school; an alpha particle and a beta particle are things that are transfered from one atom to another isotope (eg: hydrogen alpha/beta particles transfering to uranium isotope to become another element). <Please correct me on this area, for I am very vague about this subject. It is fun to help, as I could flip back over my mind to my previous knowledge. I will not look further into this field as I have no interest in this topic>. Search in Websites that could have information such as this. This content is not too complex, and can be easily found on the internet. Wikipedia is usually a handy tool for these kind of questions. Becareful when you are quoting from Wiki as the content may not be reliable. I hope this helped, Dc Nilbog

To elaborate from what Sataure said, for the second question; to get the big picture, you would need to read through topics such as 'survival of the fittest' (Darwin's Theory). There are other factors that would describe variation in meiosis (such as random assortment and pairing, selection of mates, gene flow, random genetic drift). To get the full picture you would have to study much much more. I hope this comment helped, Dc Nilbog

Correct me if I am wrong, but I think what he meant was, well, consider this example: To determine Y> X = Y / 2 X*2 = Y Y = X / 2 I hope that helped Dc Nilbog

Hi there, i've just registered with these forums, so this is my first post. I thought this would be a great place to aid me on my scientific career, so firstly I just wanna say Hi. Secondly, well, the main point of this post is because I am stuck on an Organic Question; questions that I need to answer in a laboratory report write-up. Here are the methods that were executed during the experiment: [size="3"][font="Arial"][b]PREPARATION OF AN ALKYL HALIDE (N-BUTYL BROMIDE)[/b][/font] [/size] >This preparation involves the conversion of an alcohol (1-butanol) to a haloalkane (1-bromobutane). [font="Arial"]Equation for this experiment:[/font] H+ CH3(CH2)3OH + Br- -----> CH3(CH2)3Br + OH- [font="Arial"]----- Procedure -----[/font] a) Water (10mL), sodium bromide (9g) and n-butanol (7mL) was put into a round bottom flask. b) Later, concentrated sulphuric acid was gradually added to the flask. c) This mixture of liquids was put into a reflux condenser to distill for about 30min. d) The mixture was allowed to cool to room temperature, and the apparatus was then rearranged for distillation. e) This mixture was re-distillated until there were no more oily droplets appearing in the condensate. f) The distillate formed was put into a separating funnel. At this stage, water was added to the mixture and then water layer was discarded, while the lower layer 1-bromobutane was drawn off into a small conical fask after each washing. g) The last traces of acid was removed from the distillate by washing with dilute sodium carbonate. This was poured out into a conical flask. h) About 2g of anhydrous calcium chloride was added to the flask to remove the last traces of water. This sample was shook intermittently for about 15 minutes. i) The mass of a conical flask was measured. The product from the previous distillate was re-distilled using a dry apparatus which was distilled at 97-102'C. j) The yield was weighed. Here are my questions: 1) In the first distillation of the crude product from the reaction mixture, water distilled over with the product. If the temperature had been recorded it would have been about 90 degrees Celcius. Comment on this. 2) Two other minor impurities in the crude product are but-1-ene and di-n-butyl ether. How are these formed? Find out their boiling points and assess the ability of the above purification process to remove these impurities. >I would be very appreciated if anyone could help me answer these questions or even comment on my procedure write up punctuation/grammar/content (this procedures part is just a rewrite of what is in my study manual). >I am currently doing a first year organic paper and I am not really that top of my game at the moment. If you are explaining something, please make it easier for me to understand. Thank you very much for your help Dc Nilbog