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Explain the effect of cooling the ammonia on the yield of the reaction. Use the following boiling point data in your answer: N2: -196 degrees Celsius, H2: -253 degrees Celsius, NH3: -33 degrees Celsius

I'm doing my HSC this year and I was just wondering when do we have to start writing down our preferences for uni courses for 2013 and how many preferences can we have?

Out of curiosity, just wandering what your opinions are on the difficulty of the science modules. In Chemistry, which core module is the hardest?? In Physics, which core module is the hardest??

Describe the changes to pH in the following reaction mixtures. Be as specific as possible. a) Excess magnesium reacting with a dilute solution of sulfuric acid. b) Sodium added to pure water at 25 degrees Celsius. c) Heating an open bottle of soft drink (& bringing the solution back to 25...

I need help with these projectile motion questions, I can do part a) and part b) for question 9, and part a) for question 10 but i can't do the rest!!!!! HELP!!!!

I need help with these projectile motion questions, I can do part a) and part b) for question 9, and part a) for question 10 but i can't do the rest!!!!! HELP!!!!

I was just wondering should I drop Modern History? if I do then I'll be down to 10 units. I just want to know would it be a wise choice?