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The question of whether a student’s school cohort’s performance affects the student’s assessment mark has been asked many times (https://boredofstudies.org/threads/how-do-rankings-of-schools-affect-your-hsc-mark.182899/page-4...

There’s likely to be a question at the end of the MEx2 paper which discriminates the top students for state ranks, but it’s possible to score adequately high marks without spending excessive time trying to achieve this, when marks can be gained in other subjects using this part of your time budget.

I count only 11 units if you are only doing one of the two options of economics or legal studies. I understand that 13 units is the minimum required for Yr 11, so you might have to consider what other subject you might be interested to take. You can drop units at the end of Yr 11.

From what I’ve observed at our school which is usually ranked 300-400, ATAR is never affected by anyone else’s performance if you are ranked first in a subject and also perform best in your school cohort at the HSC exam for that subject. Otherwise, if assessments are very accurate (eg. teacher’s...

Oh, oops sorry, new curriculum started even earlier in 2019 for Yr 11, with 2019 HSC maths paper being the last year of the old curriculum. I got confused because this thread discussion centred around 2020 vs 2021 (& I forgot how long ago DS sat his first HSC exam).

Course are over two years (preliminary HSC & HSC), so the new curriculum actually came into effect for Yr 11 students in 2019, whilst the first HSC exam with new curriculum materials was in 2020. In general, NESA would say that the new curriculum started in 2019 because it started for Yr 11...

Please note that my post was made in response to another post, to correct a misinterpretation of the decreasing slope. Up until saturation is approached, if you examine the coordinates along the curve, it does approximate a negative logarithmic curve, so on reflection, I think my post was...

It’s really strange to me that selective schools cap the number of places in extension maths classes, particularly at such low numbers. Our local nonselective high school encourages anyone who wants to do extension maths to do so (not that most students would want to).

Our school provides the marking rubric for all assessments. Students who fully address all components of the rubric usually score perfect or near perfect scores.

This does happen. Usually, our school is ranked around 300 to 400, but the year my eldest sat the HSC, her English teacher, who had previously taught at James Ruse, told me, at the parent teacher interview, that the top three students in her English class (all girls as it happened) were all as...

It did briefly cross my mind before posting that OP might be at Uni given her HSC year is listed as N/A, so thanks for your post.

Since 1 mole of H2SO4 is 98.08 grams, 2.999 grams of H2SO4 is 2.999/98.08 moles = 0.0306 moles Every mole of H2SO4 produces two moles of H+. Therefore 0.031 moles of H2SO4 produces 0.062 moles of H+.

Yes - your selected responses to both questions are correct.

Did they give you the opportunity to do so? If they did and gave you the choice of options, then as a parent, I believe they’ve done the right thing because no one has a crystal ball to know how any choice will turn out.

All of the citric acid in the experiment system was originally contained in the 75mL of bottled drink. Water was added to make the solution a total volume of 250mL - in other words, the citric acid concentration became more dilute in the titration solution compared to the drink but the total...

It does sound like you are under parental pressure and peer pressure and you’ve internalised some of these pressures. I can personally relate to your experience and decided to parent the way I wish I had been parented, so my kids chose not to go to selective schools even though they got in, nor...

BTW, note that because h and c are both constants, E and λ are inversely proportional to each other, so the shorter the wavelength, the higher the energy of the electromagnetic radiation wave, which is why UV light (which has shorter wavelengths than visible light) causes sunburn and skin damage...

The question states in ‘Step 2: A 75.00 mL bottle of drink was opened’. Distilled water was added in step three for the second titration but the only citric acid present came from the bottle of drink and so after working out the total number of moles (in the 250 mL beaker of diluted solution)...

Your explanation about buffers is good, but the graph of pH change as the HCl is bubbled into the water is the shape of a negative logarithmic curve and since pH = -log[H+], the shape corresponds to a linear increase in [H+] as a constant amount is added, until the solution reaches saturation. .

I’m uncertain from the words/phrases you use whether you have the right plan or not. For example, you use the phrase ‘find moles of acid. n = m/mm’, which suggests that this will be determined through measurement which is incorrect - the correct step is to calculate the number of moles required...