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So, I have been reading the conquering chemistry textbook and the jacaranda chemistry textbook and both of them combined have a lot of reactions that ethylene undergoes. Do I need to remember ALL THE reactions that ethylene undergoes or do I just need to remember the common ones? Also do I have...

thank you so much :)

Why is it necessary to exclude air from catalytic and thermal cracking? All the textbooks I have read say that thermal and catalytic cracking are carried out in the absence of air. But none of them bother to explain why! Can someone pls tell me why it is necessary to remove air :)

are ahmad shah's notes like the best? how much did he get for chem? should I use the revised ones or the original ones?

thnx

Can someone pls give me a full set of ahmad shah idil notes, like for all topics. I only have it for production of materials!

Re: HSC Chemistry Marathon 2016 Hey RachelGreen did you write all these answers of the top of your head? How do you remember all this? Makes me feel dumb!!!

ok thanks :)

I have been doing some trig questions and I have difficulty finding the negative angles in questions where the range is -180 < x < 180. If you know what I mean. for example when tanx = 2 or tanx = 1/2 -180 < x < 180 x = -2.678, -2.034, 0.464, 1.107 I...

My Economics teacher is really shit, she just blabbers on in class and barely covers content. She expects us to do everything at home. If you tell her to change her teaching style she just ignores you. Can I just read the market economy textbook and do past papers, to do well in economics. (IS...

Lol :)

Thanks for explaining it, I understand it now and if in the future, I have any questions I'll surely let you know. :)

Thanks Leeuhan. It's starting to make more sense and hopefully I get it by reading over it again and again if I still have any questions I'll just ask you or someone else. But thanks anyways :)

Can someone explain the Michelson and Morley experiment (in particular the interference pattern stuff) I sort of understand it but sometimes I doubt my understanding of the experiment and get confused. What does it mean by "measure the speed of the earth relative to the aether?" Pls help...

Yo leehuan can you pls explain the Michelson morley experiment to me. I think I get it but sometimes I get confused. The thing I don't get is how are they measuring the speed of the earth relative to the aether? And how does the interference pattern stuff work? Can you pls explain it to me it...

Every time I do past papers and I come across 4/5 mark questions, I get like a brain freeze!! I don't know what to write and always turn to the answers, to see what they have written. How do I prevent this? Does this happen to everyone at the start? PLS help

Shuuya I have some questions related to your answer: Why do you kind of compare it to polypropylene (at the start of your response)? Is it necessary to do so?

Thank you everyone :) very much appreciated

Thanks for the answer :) it helped a lot.

More carbon atoms means more bonds which means that there will be more dispersion forces and therefore more energy is required to break all the bonds. Hope that helps :)