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yes - O atom has 6e, H atom has 1 E, but an extra e makes it a negative ion, resulting in the octet needed. H+ just joins one of the lone pairs.

derive the cartesian equation, but ull have Y= ....... + 80 and solve for x = 0, oe sol. will be negative, so ignore that one and take the positive one have a go, show ur working, then see if you cant get it..

technically yes, lewis' definition would be easier to explain with, but B-L definition is fine. i.e. you COULD be asked this questions in the HSC, its realms do NOT fall outside the syllabus In fact im pretty sure ive seen this querstion in a trial paper.... anyways, dont worry about the...

yeh, but u ignored the 'finely powdered' part...LOL...you cant do that, your changing the question. Although your conclusion is correct, i believe your interpretationis wrong. Also, when u say "if I add more 0.1M HCl solution to 0.1M HCl solution, the amount of HCl present increases but...

this isnt too bad well, going on the Bronsted-Lowryd efinition of acid-base reaction (proton transfer), since a H+ (a proton) is being accepted by the base, a bond is forming between one of teh atoms in the base and teh H+. But teh H+ has no electrons, and since it will be a covalent bond...

The question, as presented by the OP, states: "Consider the following reaction: FeO(s) + CO(g) (double arrow) Fe(s) + CO2(g) ΔH = –283kJ Which of the following changes to equilibrium conditions would favour the formation of iron? A the addition of more finely powdered FeO B an increase in...

its definitely D. in A they are testing whther you know increasing the surface area by making FeO a powder increases the reaction rate, but this happens for both the forwarda and reverse reaction, and does not affect they equilibrium/yield, just how fast it achieves this equilibrium....

memorising the periodic table and reactivity series is pointless knw yur cmmon ions thugh: all the simple nes,a s well as carbnate, sulphate, phosphate, ammonium, etc..

Bachelor of Science, majoring in chemistry? Chemical engineering? industrial chemistry?

1) i dont DO chemistry, i completed my HSC last year (look to the LEFT of my post) 2) still dont understand what's at the bottom right hand corner...it doesnt disclose the school 3)what do you define as 'stupid'? i rekon i went pretty well in the HSC, especially Chemistry...

where can i get a copy of the 100 integrals?

this Q looks familiar, im pretty sure it is from a past paper, probably CSSA and probably MX2, but possibly from another trial

what school?

if you want any chance of finishing the course before the trials, you should eb onto your fourth topic by now...

no worries

PS. this is an 'inverse' problem, NOT an 'inverse trig' problem also could have used quadratic formula to find y in terms of x....

i like tot hink of molecules as "the smallest unit of substances that may enter into a chemical reaction"

well depends which definition of acid you are saying. bronsted-lowry definition, no lewis, yes any bronsted lowry acid is a lewis acid

i dont think u understand what i was saying. Using degrees celcius in HSC is fine (who would use kelvin??) - im just saying that if you have data in the question all to 3 sig fig, but they give you 'the temperature is 25 degrees celcius' - u are not to take that as being 2 sig figs, because...

here's my 2 cents: Least number of significant figures in the data -----> Applies to everything except pH (Note: when they give you the temperature, chemists take kelvin to be the stanard, so even if they give 25Celcius, its taken to be 298 kelvin, and so 3 sig figs no. of decimal places...