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Me three! I got somewhere around 628KJ/mol

I got C 0.48%

I remembered the carbonated method after I wrote my response but didn’t have time to change my answer - ugghh hopefully litmus will still be accepted!

Phew! yea same I used oxidation but then to confirm then presence of the acid l also wrote about the litmus test

Probs a high cut off, around 83 maybe??

Yes same I also got that! What did people put for the MC q about radioactiviy and for the last MC q? Kind disappointed about the 3marker on enthalpy and the functional isomer q cuz I got confused about positional and functional isomers but overall the trst was okay ! Also are ketones acidic?

Thanks heaps jazz !

Hi, I need help with the following question please: How can one make 3-chloro-2-butanol ? How can one make 2,3-pentanediol? Thank you :)

I see, thank you! I hope that will be the case this year !!!

How do you think our test compares in difficulty to those of previous years, cuz I thought last yrs exam was apparently hard but 80 raw was needed for an E4.

I'm guessing a high band 5, around 88/89 ,though Im not rlly sure cuz the cut off can change (I hope 70% raw will correspond to around 85 this year 🙏🏻)

I see, my bad .... thank you for the clarification!

I also got B, cuz I thought that there were 2 branches, right????

Thanks!

Thank you! Also, just a quick q, in circle geo, what is the difference between angles standing on the same arc and angles in the same segment? Thank you :)

Hi everyone, May someone please help me out with this q. How did they make the substitution; why does it say 2cot(2y) and not 2cot(y)? Thanks :)

Apparently they will half your 2u mark - e.g. if you get 80/100 in 2u but 44/50 in 3u then they will only count 40/50 for 2u and 44/50 for 3u - because the HSC is kinda out of 500

OMG SAME ! I used the rule e^lna = a instead of logging etc !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

That is correct - both decreasing at 365 etc. And rate of change=-365 etc are right. You only lose marks if you use a double negative, ie write decreasing at -365 :)

Yep, I did the same! However, I ran out of time and didn't prove that 1+sqrt2 is a max - how many marks will I lose? Also I made An=0, is that fine?