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  1. Xylferion

    Physics: Post your doubts here!

    Did you find the time for 1 swing? I'm sure that would work.
  2. Xylferion

    Physics: Post your doubts here!

    You cannot find the time period from a displacement/distance graph, but you can find the wavelength. Firstly though, form any relations you can between the values that have changed. They tell you that waves move "forward" by 0.25T. T = 1/ƒ 0.25T = 1/4ƒ The above indicates that the frequency...
  3. Xylferion

    Physics: Post your doubts here!

    Is it 1.2%?
  4. Xylferion

    Physics: Post your doubts here!

    It depends on what type of uncertainty you're working with. There's the random uncertainty in which you use a range of readings. This is: (Maximum value - Minimum value) / Number of readings The random uncertainty is the absolute uncertainty. It's the +- value you see after the main value...
  5. Xylferion

    No ._.

    No ._.
  6. Xylferion

    Chemistry: Post your doubts here!

    I found this explanation on another forum and it explained it very well. "If you consider a gaseous system at equilibrium then the total number of moles is constant, the temperature is constant and so according to the gas laws if you wish to increase the pressure you MUST change the volume...
  7. Xylferion

    Chemistry: Post your doubts here!

    http://www.examtestprep.com/
  8. Xylferion

    Chemistry: Post your doubts here!

    It's because of the fact that the volume is low and the gas is under high pressure, that it wants to expand and move to the side with the fewer moles. Equilibrium will counteract whatever change pressure makes. This would not be the case if you were considering a non-equilibria based question.
  9. Xylferion

    Chemistry: Post your doubts here!

    Hydrolysis using an alkaline catalyst. The catalyst being KOH in this reaction. The ester splits up into [CH3CO2] belonging to the carboxylic acid, and [CH(CH3)CH3] belonging to the alcohol. First step, CH3CO2CH(CH3)CH3 reacts with the OH- ion to form a carboxylate ion and an alcohol. The...
  10. Xylferion

    Chemistry: Post your doubts here!

    Kc and Kp both define the rate at which a reaction proceeds, that is to assess the frequency of collisions between the reacting molecules. When you alter the pressure of a "gas", the equilibrium " position " shifts to the side with a higher/lower amount of moles. With that in mind, the...
  11. Xylferion

    Chemistry: Post your doubts here!

    In organic chemistry, oxidation and reduction are defined differently. Oxidation is the addition of oxygen atoms to a molecule, you often see them as [O]. It is also the removal of Hydrogen atoms. Reduction is the removal of oxygen atoms, [O], from a molecule. It is also the addition of...
  12. Xylferion

    Chemistry: Post your doubts here!

    Ah yes thanks for reminding me :) I just want to thank you Sir, as your videos have really helped me out a lot! I've learned more from your videos than I have throughout the past couple of months, thanks a ton!
  13. Xylferion

    Chemistry: Post your doubts here!

    Oh sorry CO was meant to indicate a ketone formed, and yes the aldehydes can be oxidized further to COOH.
  14. Xylferion

    Chemistry: Post your doubts here!

    CO2 + H2O = H2CO3 That is H+ added to [CO3]^2- These undergo ionic bonding to form H2CO3 since 2 H+ ions are needed to balance the -2 charge on CO3.
  15. Xylferion

    Chemistry: Post your doubts here!

    The answer to question 37 is D and here's why. Each of the 3 hydrocarbons contain double bonds, the addition of hot conc. kmno4 reiterates the fact that these are alkenes. Hot conc. kmno4 has alkenes undergo strong oxidization, that is after the diols place themselves across the double bonds...
  16. Xylferion

    Chemistry: Post your doubts here!

    Hydrogen bonding only takes place with Fluorine, Oxygen and Nitrogen.
  17. Xylferion

    Chemistry: Post your doubts here!

    Nope, it's just that when they join, the radical dot continues its chain with the other radical. It all depends on how you connect the radicals together. Much like tetris.
  18. Xylferion

    Chemistry: Post your doubts here!

    Too little information right there. All you've mentioned is the concentration you want and the molar mass you have. Concentration =[Mass / Molar Mass ] / Volume You've only mentioned, 25 = [Mass / 85] / Volume You're missing one more quantity.
  19. Xylferion

    Chemistry: Post your doubts here!

    With propane, there are 3 carbons. You can have the little dot ・, which is basically an electron, appear on any of the three carbons. The thing is, if you have it on the first and third carbon, that's the same thing, because you will start numbering the carbons, from the one that has ・. The...
  20. Xylferion

    Chemistry: Post your doubts here!

    You write out the bromination of propane. Br2 ---> 2Br・ Br・ + C3H8 ---> C3H7・ + HBr C3H7・ + Br2 ----> C3H7Br + Br・ Br・ + C3H8 ----> C3H7 ・ + HBr Then in the termination step, you have two radicals react. So you can have C3H7・ and C3H7・ react to form C6H14. The catch here is that there's two...
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