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The main thing to overcome that is by doing lots of practice on exam questions. It's a subject that to do well you need to be doing consistent practice throughout the year even if you are doing the higher levels of maths. As it's not possible to start studying for it like 1 week before the exam...

The maths in chemistry isn't really maths. In the sense of you aren't using anything from maths advanced or extension like derivatives The difficulty in chemistry calculation problems arises from the understanding of the chemistry concepts rather than the maths aspect. If you look in the exams...

Do a molar ratio but with volumes a) n(H2O) = 1/2 n(HF) v(H2O) = 1/2 v(HF) v(H2O) = 1/2 (25) = 12.5 L Same thing for b

3) Under same temp and conditions, equal volumes of gases have the same moles. So when you write the equations for combustion the CO2 and H2O should have same molar ratio. Go through and do fuel + O2 --> CO2 + H2O and balance all of them. The one that has same balancing for the CO2 and H2O is...

2) Whenever questions have things about concentrations or values in general, it is a good idea to write some formulas or equations. Here there is dissolving equations: Ba(OH)2(s) --> Ba2+(aq) + 2OH-(aq) NaOH(s) --> Na+(aq) + OH-(aq) So in total we have 1Ba2+, 1Na+ and 3OH- [Ba2+] = [Na+]...

1) It's a Le Chatelier's Principle question as there is like an equilibrium. More solvent in the X part means concentration of I2(x) decreases as in c=n/v the volume has gone up. This means the equil. is disturbed and shifts right to minimise change. Leading to increase in I2(x) and decrease...

The above answer in this case is incorrect as volumes are provided so n = m/MM cannot be used as this is utilised when masses are provided. In this case there is a gas law which you have to remember. Which is Avogadros Law: it states under the same temperature and pressure, equal volumes of...

There is a rule and a reasoning behind that but for the content taught specifically in the HSC syllabus it doesn't explain it. In most scenarios for HSC based questions if they require you to react something like that where multiple products could be formed, it will normally occur in a reaction...

Poorly structured question based on the content taught in syllabus. As the syllabus states carboxylic acid containing compound (COOH) are organic acids and that amines (NH2) are organic bases. Going off that which the syllabus teaches either A or D is correct. If this is your school exam, ask...

Storing organic substances doesn't just mean keeping them all together and the oxidising agents away. Each chemical type will be stored in different locations such as flammable compounds, corrosive compounds, oxidising agents etc. The main point of storing things away from each other is related...

The half-equations are on the data-sheet given in the HSC exam so yes you can be asked about them and you don't need to specifically memorise them as they are already on the sheet, just know where they are. The colour changes you need to know. For example, a question that could be asked is "A...

You can name it directly from that form if you are able to visualise it easily from that short hand form. That takes some practice and develops over time, so if you feel more comfortable drawing it out and then looking at it that way you should do that.

AgNO3(aq) + Cl-(aq) --> AgCl(s) Find moles of AgNO3 using n = CV molar ratio for Cl- moles Use m = n x MM for Cl- mass

Ba(NO3)2(aq) + SO4 2-(aq) --> 2NO3 -(aq) + BaSO4(s) m(fertiliser) = 1.50 g 38.5% of that is sulfate so m(SO4 2-) = 1.50 x 38.5/100 Find moles of SO4 2- from there using n = m/MM Molar ratio between SO4 2- and BaSO4 to find BaSO4 moles Find mass of BaSO4 using m = n x MM

The other scholarships are usually the ones that are paid fortnightly

I'm not sure if it's changed but when I got the AAA scholarship a few years ago it isn't an ongoing amount that you receive. It was only a one off payment and then no more after that.

Write an equation: Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g) Find moles using n=m/MM Do molar ratio with Mg and H2 to find moles of H2 Use n = V/Vm to find volume of H2 gas 25 degrees and 100 kPa means Vm = 24.79 in that above formula (using the data sheet)

I worked like 20-25 hours at one point (doing a research internship, tutoring and making tutoring materials) each week, while topping most of my courses that year. It's possible to do more than 10 hours without it taking a hit to your marks but it will for sure take a hit to your social life and...

hahaha nah I didn’t drop it for that reason (I actually did better in physics at the beginning). It was cause doing 2 sciences was too much in terms of having labs for both which in 2nd year onward can be around 3-4 hours per subject, so I tried one sem where I did 3 subjects and I had 11 hours...

hahaha never saw him unfortunately I dropped physics after a year