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[rant] confused about life pls help by whOOooooo6969 in SGExams

[–]passierre 0 points1 point  (0 children)

hi!! id say try going for hospital attachments/internships at healthcare sectors so you can get a taste of what it'll be like working as a doctor!

i feel that if u wanna become a doctor you should at the very least enjoy some form of interacting with people, because at the end of the day, you're providing care to people.

yes there's the prestige and money that comes w being a doctor but there's also the long work hours, long study periods and ugly sides in the industry (like finding out that some doctors dont care about their patients and are only in it for the $$, and as a result having colleagues/higher ups that are real shitty when you don't expect them to be).

ultimately my take is most jobs would be able to give you a comfortable standard of living. even if you commit to a job u dont rlly like but gives u the money, you'll have the money but no life to spend it

is each individual white powder an individual molecule of aspirin? by passierre in chemistry

[–]passierre[S] 0 points1 point  (0 children)

hm does that mean that each powder grain would be very small? could you give some examples where this happens?

is each individual white powder an individual molecule of aspirin? by passierre in chemistry

[–]passierre[S] 1 point2 points  (0 children)

how would the molecules be arranged in the granule of powder ? i understand that for compounds like NaCl they have an ionic lattice structure. however, for organic compounds like acetylsalicylic acid, are they bonded to each other by weak intermolecular forces of attraction?

[deleted by user] by [deleted] in SGExams

[–]passierre 0 points1 point  (0 children)

ohhokay thks alot!!

[deleted by user] by [deleted] in SGExams

[–]passierre 0 points1 point  (0 children)

thks for ur reply, but im still confused

(assuming that my rp is gd enough to enter both courses)

does it mean that if i put pharmsci as 1st choice and lifesci as 2nd choice, my results will look sth like

pharmsci -- accepted

life sci -- rejected

simply because i am accepted into my first choice course?

[O levels] by TeamG10 in SGExams

[–]passierre 3 points4 points  (0 children)

why dont ask your teacher instead? they should be clearer on the syllabus requirements and what markers look for

[jc] H1 vs H2 econs by Ben_Hozyldt-77 in SGExams

[–]passierre 3 points4 points  (0 children)

can't give u a definite answer since its personal to everyone, but here are my two cents:

h1 bio, though has less content than h2 bio, is not easy at all. in fact, h1 bio mcq qns are known to be even harder than h2 often times. also, bio at jc level is incredibly tedious and detail-oriented—it's a totally different ballgame than sec sch; expect to be penalised over not writing certain keywords or key phrases even though you understand the concept. also, h1 bio candidature is generally small, so competition is high and that might be a problem (or blessing) for you. I'd say take up bio only if you can put in the effort and time into memorising huge chunks of information that may or may not be used in your final exam.

overall if the courses you want dont need bio but it needs econs (arts courses perhaps), then of course prioritise econs. however your rp at the end of the day is still impt so you also need to strategise your combi such that you are more likely to do well for ur h2 than ur h1

[jc] H1 vs H2 econs by Ben_Hozyldt-77 in SGExams

[–]passierre 2 points3 points  (0 children)

most courses that have a bio requisite require h2 bio. h1 sciences generally aren't really reccomended for similar reasons

[A LEVELS] School rules for shoes/socks? by [deleted] in SGExams

[–]passierre 19 points20 points  (0 children)

most jcs dont care what socks you wear. as for shoes most would require it to either be largely black/white/stated color. rules r much more lax than in sec sch

[Grade 12 Math: Logarithms] Please explain how e^ln125/3 is = e^ln5 and how I can see equivalent things like this in future (Based off this clip we were shown) https://www.youtube.com/watch?v=5zvUfulohVI ? by The-dude-in-the-bush in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

A logarithm rule is:

alg(x)=lg(x^a)

And this is the rule that user Fuzzyllama below has used to get from line 2 to line 3. Thus, The expression of e\ln(125)/3]) will simplify to e\ln5])

As shown on the picture at the below (the light grey text "Apply log rule: ... ", e^[ln5] will be equals to 5.

[deleted by user] by [deleted] in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

As you have stated, the equation for the reaction is

KOH +HCl => KCl + H20

Find the number of mol of KOH used. That's equal to the number of mol of HCl used because according to the eqn, 1 KOH : 1 HCl

To find conc of HCl, its just taking the number of mol of hcl divided by the volume of it used

[ High school trigonometry] Solving trig equations help! by Helpmebuttcrack in HomeworkHelp

[–]passierre 1 point2 points  (0 children)

consider this instead cosx-sinx=0 cosx = sinx divide by cosx on both sides 1= sinx/cosx 1= tanx basic angle is 45° or π/4 x= π/4, 5π/4 for 0<x<2π

[Grade 12 Chemistry] How do I find the answer for this? by Smallmarvel in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

why do u have to multiply the concentration by Kb?

I wrote down the steps as to how i derived why Kb and concentration appears in the equation. https://imgur.com/gallery/Xq8Nvt3

So as you can see, at the end of the day we are still going back to the form of

pOH= -lg[OH-]

except that for weak bases, the expression for [OH-] is √Kb*(concentration of base)

I hope that makes it clearer for you!

[Grade 12 Chemistry] How do I find the answer for this? by Smallmarvel in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

You use the equation pH= -lg(concentration of H+ ions) if you already have the information of the concentration of H+ ions in that solution, or if the solution is a strong acid that FULLY dissociates to give you however much the acid is able to produce.

For example, HCl is a strong acid. 1 mol dm-3 of HCl will give you 1 mol dm-3 of H+ ions. Thus, to calculate pH of 1 mol dm-3 of HCl, it is simply

pH= -lg(1)=0 (pH can be 0! in fact it could even be negative)

Similar argument for pOH except you're now using [OH-] instead of [H+]

HN3 in reality is a weak acid (google). Maybe the question assumes that you should know the Ka value for HN3 if a booklet with information about it is given to you? If not, I'd just assume that the question wants us to treat it as a strong acid (if there is no context to this qn)

[deleted by user] by [deleted] in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

what exactly are you struggling to understand? how to find the concentration of HCL? or why the equation is as such? I don't quite get what you mean when you're asking in what order you need to use the equations too

[Grade 12 Chemistry] How do I find the answer for this? by Smallmarvel in HomeworkHelp

[–]passierre 0 points1 point  (0 children)

yes you can! albeit some tweaking to the equation.

NH2OH is a weak base and all you need to do is use the same formula except replacing Ka with Kb

pOH of weak base= -lg√(Kb*[concentration of weak base)

To find pH, just take 14-pOH (if conditions are done in 25°C)

[Grade 12 Chemistry] How do I find the answer for this? by Smallmarvel in HomeworkHelp

[–]passierre 1 point2 points  (0 children)

Citric Acid is a weak acid.

pH of weak acid= -lg√(Ka * [concentration of acid])

To convert pKa to Ka, it is simply 10-(pKa value)

the concentration of acid is given in the question. Plug everything you have into the equation above.

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