pyroglycerine

Hi, Why is not nitrogen (a widely abundant element which, so far as I'm aware, is not too costly to extract) used as a fuel in automobiles and power plants? Thanks, pyroglycerine

Hi, Do EMP devices exist that can disable/power off all electronic devices within a given radius? Eg. Such as the one contrived in Prison Break season 3 episode 5. I was once told by a Russian friend of mine that when he was in school, his friend had made such a device to power off people's mobile phones with a range of about 5m. How do they work? Are they used in police/military operations? Thanks, pyroglycerine

Hi, Can someone please provide me with a schematic diagram/patent/link of information for an Algae Bioreactor modified to produce hydrogen gas? (As described here: http://en.wikipedia.org/wiki/Biological_hydrogen_production_(Algae) ) I would like to learn more about it and possible produce a small scale one to experiment with. Thanks, pyroglycerine

But why?.....

.....Yes. Sorry, I should have been more specific. I meant artificial electromagnetic radiation in such forms as infrared, microwaves, radiowaves, x-rays, and gamma rays

Hi, Can anyone provide me with some information or a link to some information about the legality of chemical experimentation outside of an official educational or scientific institution (ie in a lab at home) in the UK, Spain, and China? Mainly China. I'm doing my BSc Chemistry here and I would like to start doing some experiments at home. I know I have access to practically any chemical commercially or industrially available and the same goes for lab equipment. However, although I have access, I don't know if it's legal because nobody really follows the rules/laws here too much. Why do I care? Because even if its a million to one chance, if its illegal, I don't want police knocking at my door and finding a room full of chemicals. I would also like to know the laws in UK and Spain for future reference. Thanks, pyroglycerine

Thanks!

Hi, I'm quite interested in plant biology and I do some gardening in my spare time. I have been reading online about electroculture and magnetoculture - the application of electricity and magnetism respectively, to stimulate growth in plants. Has there ever been any official research done on this? Have electricity and magnetism been scientifically proven to have a positive effect on plant growth? Does electromagnetic radiation also have any affect of plant growth? Thanks, pyroglycerine

Hi, Is it possible for me to edit a topic that I created if I wish to rephrase my question? Is it possible to delete the topic so that I may just make a new one? The only reason is because I don't want to flood the forum with multiple threads of the same topic only slightly rephrased. Of course I know if its not possible then I can just add a comment, but I's much rather edit. Please help. Thanks, pyroglycerine

Khan Academy - They have a good website or you can Youtube it. A very good source for early highschool to pre-university science knowledge.

Hi, I am currently studying my BSc in Chemsitry. I wish to study a master's degree or preferably a PhD immediately or soon after I graduate. I very much want to work in the space industry. I am starting to realize that I might have been better suited to a physics degree (although my mathematics and classical physics abilities are relatively poor). Anyway, when I graduate, what degree do you recommend I study for a career in the space industry? Thanks, Pyroglycerine

Hi, Today in my Inorganic Chemistry Experiments class we conducted the experiment: 'Preparation and analysis of the composition of ferrous ammonium sulphate'. At the end of the experiment we dissolved 1g of our ferrous ammonium sulfate crystals in pure water and then added 1mL of 6mol/L HCl and 1mL of 1mol/L KSCN solution. Extra pure water was added to bring the solution in the test tube up to 25mL. We then made a semi-quantitative colourimetric measurement to determine if it was I, II, or III 'colour reagent level'(is that correct? maybe I translated it wrong). My question is: Is the 'colour reagent level' the same thing that is indicated in, for example, ammonium Iron(II) sulphate ? If so, why when I search the internet does 'ammonium Iron(I) sulphate not exist? I can only find ammonium iron(II) sulphate and ammonium iron(III) sulphate. I'm studying my BSc in Chemistry here in China and it's all in Chinese (my native language is English), so sometimes it's hard for me to ask questions or understand some things, hence why I'm asking you here. Thanks in advance for all your help. Pyroglycerine

My apologies for the irrelevance of this post to the thread topic. Dear Enthalpy from the chemicalforums, Each and every time I go to the website it says 'Sorry guest you are banned from using this forum. This ban is not set to expire.' So yes,I am led to believe I am banned from using your forum. If you can fix this, please pm me on this forum or email me so as not to disrupt the thread any longer. When you emailed me you did not leave a means of giving you a direct reply. Thank you.

Thank you for your informative, useful answer! Yes, I have previously been banned, well, rather I left the Phy...ums for that very reason. I was also banned from the chem...ums with no explaination whatsoever. As far as Im aware I only ever made one post there.. Anyway, great forum here! Thanks again!

I have a couple of questions, Moderators: If it's in the wrong category, go ahead and change it, please don't ban me. If you set the background of a computer screen black, would it lose less energy than if it were white? If you were to place a cover over the screen so that light cannot escape, it would transfer to heat energy correct? Please could somebody explain to me the process of the transformation of light energy to heat energy? Thanks,

This question is translated from Chinese so forgive he possible bad wording. Also the question may not make sense, if this is so, please tell me. At 0C mercury in a barometer reaches 760mm. Upon changing the pressure, 3ml of air enters the tube of the barometer causing the mercury level to drop to 570mm. Calculate the volume of air that occupies the barometer. I have no idea where to begin wih this question, it was hard enough translating it. If you think it doesnt make sense and have a suggestion of what they might be trying to ask then please go ahead. Any help at all will be great. Thanks 在0C时气压计内汞柱高760mm, 在该压力时，通空气3ml入管内汞柱降至570mm,求这时空气在气压计内所占体积. If by any luck you are Chinese, that is the original question.

The question asks to prove with episilon and delta. I cant find a way to input equations on this forum yet so ill put it in words: prove with epsilon and delta that the limit of the square root of x as x approaches c is equal to the square root of c. Studiot: dont worry about it, thanks for trying to help. Also if anyone could explain to me how to input equations on posts that would be great. Regards

Thanks for all of you who replied. I have managed to make parallels and translations and everything is more or less clear now. The website zhongwen.com helped too, thanks.

Thank you very much for clarifying that for me. The reason it's worded weirdly it's translated from Chinese and that's also probably the reason I didn't understand the question properly. Anyway, great help, thanks again!

Hi, The Question: For 1dm cubed of a gas in normal conditions with a mass of 2.86g, calculate the average relative molecular mass and density at 17C and 207kPa Please explain to me the method of solving this. My working for the average relative molecular mass: M=mPV/RT M= 2.86x207x1/8.314x290 M= 0.2455g/mol Mr=0.2455 This however is not correct, as the answer in the textbook is 64.1 Thanks.

Hi, I'm a British student in the first semester of my BSc in Chemsitry here at Xiamen University in China. This question is aimed at people literate in Chinese. In Chemistry in the English language so far as I'm aware we don't have this or we just describe it in words. What do these characters mean that appear after state variables? (There are a lot, here I am only showing a few) Is there a website/book with the translations? I have looked in Eng-Chi dictionaries of chemistry and they dont show it. Eg. p=p实-p内 Eg. p总V总=nRT Eg. (delta)U=U生-U反 thanks in advance, 谢谢

Its a requirement for everyone to take a calculus class for all subjects, not quite sure why. The equation didn't seem to appear from that code.. what I meant was: Lim√x = √c x-c

Hello, I'm new to this forum so if I'm breaking the rules by posting in the wrong place etc then please correct me. I'm a British student studying Chemistry in Chinese in Xiamen University in China. I've been re-capping my Chinese language for the past year and nI have just started my degree this year. I only have two subjects this semester - Calculus and Inorganic Chemistry, whilst the Chinese students have additional subjects: Marxism, Army training, etc. My point is that I havn't studied Mathematics or Chemistry for a while so I need some help, hence why I joined this forum. Here is my problem: Prove that if c>0 Then \lim_{x-c}\sqrt{x}=\sqrt{c} I understand the calculus and the method of how to prove it, I suppose my problem is just that I 've forgotten how to expand square roots. Please explain it to me. Thanks.