AS Chemistry- helping each other out!

Original post by Dylann

It's not really a "Chemistry" challenge as much as it is "How good are you Google skills" challenge

True but it does prep you up for the C3L6 paper in June :tongue:

Reply 221

Original post by zhang-liao

True but it does prep you up for the C3L6 paper in June :tongue:

It really doesn't though! I'm pretty sure the online challenge content is way more advanced than the paper content (which is actually loosely based on AS content!)

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Reply 222

Original post by danconway

It really doesn't though! I'm pretty sure the online challenge content is way more advanced than the paper content (which is actually loosely based on AS content!)

Posted from TSR Mobile

It is a bit more advanced than the paper but not waaay more advanced.
Have you checked out the papers available online yet?
Some of the questions are simply content you learn at AS but other questions are more complicated though.

I feel like you're all ganging up on me for suggesting the online challenge :colondollar:

Reply 223

Original post by zhang-liao

Ahaha of course not- I love the online challenge! But I could never really see any of those questions being in the real test paper (I've looked at some of the written paper questions). On the online challenge, I've seen questions on standard electrode potentials!

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Reply 224

Original post by danconway

The online challenge is harder than the paper but you do have Google to help though. The paper is still kinda difficult :colondollar:

(edited 9 years ago)

Reply 225

Millie-3

Original post by danconway

Probably!

Welcome anyway, funny Northern Irish board person :wink:

Also I'm just going to put this out there. CCEA exam papers are aesthetically hideous. :P

Why thank you, it's an honour to be here funny... Chiswick person :P

and i would agree with you, but the papers do grow on you after a couple of years.

Reply 226

BBeyond

Does anyone here do edexcel? What are you guys averaging on papers? :biggrin:

Reply 227

hi who knows the answer to this and how do you work it out?

12 What is the total number of atoms in 1.8 g of water, H2O?

DATA
x The molar mass of H20 is 18mol-1
x The Avogadro Constant is 6.0 × 1023 mol–1

A 6.0 × 1022

B 6.0 × 1023

C 1.8 × 1023

D 1.8 × 10[font="MyriadPro"]24

thanks

Reply 228

ozzie2

Hey anyone doing AQA here? Polar and dipole stuff is so confusing and weird, probably the only hard part so far in chemistry.
Well apart from limiting reagents, does anyone have any tips for doing those types of questions like a method or something?

Reply 229

BBeyond

Original post by ilovecake123

hi who knows the answer to this and how do you work it out?

12 What is the total number of atoms in 1.8 g of water, H2O?

DATA
x The molar mass of H20 is 18mol-1
x The Avogadro Constant is 6.0 × 1023 mol–1

A 6.0 × 1022

B 6.0 × 1023

C 1.8 × 1023

D 1.8 × 10[font="MyriadPro"]24

thanks

((1.8/18)x6x10^23)x3

So C :smile:

Reply 230

Original post by BBeyond

((1.8/18)x6x10^23)x3

So C :smile:

I helped someone with this exact question about 4 pages ago... seems to be particularly troublesome for people :/

Reply 231

Original post by BBeyond

((1.8/18)x6x10^23)x3

So C :smile:

thanks

Reply 232

lyricalvibe

Original post by zhang-liao

The online challenge is harder than the paper but you do have Google to help though. The paper is still kinda difficult :colondollar:

From what I've seen stalking stalking pages quite a few tsrians get like silver so I think it'll be fairly challenging but not ridiculous or anything like that :smile:

does doing the weekly challenge aid performance in the end of year test?

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Reply 233

BBeyond

Original post by danconway

I helped someone with this exact question about 4 pages ago... seems to be particularly troublesome for people :/

Yeah I guess people haven't been taught how to distinguish between when they ask for number of molecules and atoms in these sort of questions :tongue:

Reply 234

How do you do this one?

16 3.0 dm3 of sulfur dioxide reacts with 1.5 dm3 of oxygen, under suitable conditions,according to the equation below.
2SO2(g) + O2(g) o 2SO3(g)
What is the maximum volume of sulfur trioxide that can be formed in the above
reaction?
[The volumes of the gases are measured at the same temperature and pressure.]

A 6.0 dm3

B 4.5 dm3

C 3.0 dm3

D 1.5 dm3

Reply 235

Original post by ilovecake123

A 6.0 dm3

B 4.5 dm3

C 3.0 dm3

D 1.5 dm3

Work out how many moles of each there are.

Reply 236

Original post by danconway

Work out how many moles of each there are.

then?

Reply 237

Original post by lyricalvibe

From what I've seen stalking stalking pages quite a few tsrians get like silver so I think it'll be fairly challenging but not ridiculous or anything like that :smile:

does doing the weekly challenge aid performance in the end of year test?

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Not weekly..monthly :tongue:

It helps prep so I guess so :smile:

Reply 238

Original post by ilovecake123

then?

Work out the volume of gas :P

So (a) what is the moleage (I made that up :wink:

) of 1.5 dm³ of O_{2 Spoiler}(b) How many moles are there in 3 dm³ of SO_{2 Spoiler}(c) Is one of them in excess or is it in the right proportion (use mole ratio)

Spoiler

(d) How many moles of SO₃ are produced?

Spoiler

(e) How much gas is that?

Spoiler

(edited 9 years ago)

Reply 239