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This is some confusing question. :confused: Please answer it for me. :uhhuh:

I haven't done induction since year 11. :( Prove by mathematical induction that 52n - 1 is divisible by 6 when n is a positive integer.

This's from last year's trials paper of my school. In the laboratory a test solution was analysed. It formed a pale yellow precipitate with silver nitrate solution. When sodium hydroxide was added to the solution it formed a blue precipitate which dissolved when excess sodium hydroxide was...

:rolleyes: edit: never mind '-_-. i had a mind block. however i'm keeping this thread here if anyone wants to offer an explanation better than my own. i'm talking about using HCl to standardise a NaOH solution. you can't make a NaOH solution because dry NaOH absorbs moisture from the...

i can't believe it. after one hour of chemistry revision i started answering questions from the end-of-chapter exercise. first question: define an acid. i realised that i didn't know what an acid was.

Gather, process and present information on the range and chemistry of the tests used to: identify heavy metal pollution of water i'm writing about precipitation and flame tests, sodium sulfide test, AAS and AES. is this right? or is there anything i missed? :confused:

this is a second game :p (excuse me for my madness) i think someone else has created a game like this before, but since i'm too lazy to dig it up, i'm starting a new one. basically, you have to answer a syllabus-related question asked by the previous post. :) please leave out the options...

my apologies to anyone who is annoyed by the rebirth of this game in a new thread :p but seeing as it is just a few weeks before trials, let's play it again. same rules, i name a chemistry term and explain its meaning, giving as much relevant information as possible. the next person takes...

Describe how a chemist could prepare a series of dilution standards with mercury.

if anyone needs it. i know the pain of doing this text, hopefully it would be easier for you guys '-_-

1. Find the coordinates of the point P which divides the interval AB internally in the ratio 2:3 where A and B have coordinates (1, -3) and (6, 7) respectively. i keep getting P(4, 3) but the answer should be P(3, 1) 2. Find the volume of the solid obtained when the region between the...

Does anyone else do this text? I looked in BoS resources and out of ALL the files under Module B, only ONE of them was on In the Skin of a Lion. :mad:

just really want to know, exactly which indicators do we need to know about? with the indicators, do we have to know about the ranges for all of them? because if we do, then there would be a whole lot... :confused: and numbers are CONFUSING!!!!

Good Evening :) What's the range for Litmus?

hehehehehe ^^ this one requires you to read everyone else's posts. I start off with a dot point in the syllabus. Each person contributes ONE sentence only. When all aspects have been covered, we stop. Then I'll copy paste everyone's posts and make a summary. Then someone else bring up a new...

let's play a chemistry game :D you have to name a chem term and explain what it means. the term must start with the last letter of the previous term posted by the previous person. obviously i will start... acidic oxide a non-metal oxide that releases H+ ions in solution.

i know i already posted a thread about his dark materials :p but this's about the movie. who do you think should play the characters? i think... lyra - emma watson (though she's too hermioneish) will - ... not sure on that one mrs coulter - angelina jolie lord asriel - keanu reeves...

account account for: state reasons for, report on. give account of: narrate a series of events or transactions. analyse identify components and the relationship between them. draw out and relate implications. apply use, utilize, employ in a particular situation. appreciate make a judgement...

if anyone needs any practise questions... i found this wandering around in my computer :D

has anyone read phillip pullman's dark materials trilogy? :D i'm so bored...