You are Here: Home

# OCR Chemistry F321 Exam. - [Next Tuesday[

Chemistry exam discussion - share revision tips in preparation for GCSE, A Level and other chemistry exams and discuss how they went afterwards.

Announcements Posted on
1. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by v :))
How do work out the number of atoms present in a compound? Do you have to use Avogadro's Constant somewhere?
i think its (number of moles) divided by (6.02 x 10>23)
correct me if im wrong
Last edited by Man-Utd; 14-05-2012 at 19:45.
2. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
k everyone...let me ask u all a question.....

what products are formed when chlorine Cl2 reacts with water....c'mon, you all gotta know it
3. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by Man-Utd)
i think its (number of moles) divided by (6.02 x 10>23)
correct me if im wrong
Number of moles multiplied by avogadro constant, eg 1 mole is 1x 6.02x10^23, so 2 moles will be twice that = 2x6.02x10^23
(sorry if I'm sounding patronising)
4. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
okay guys. I'm just confused now, lol :|
5. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by TheFootyKing19)
THANKS BRO! Wasted an hour this afternoon looking for it with no luck.
6. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by Holz888)
Number of moles multiplied by avogadro constant, eg 1 mole is 1x 6.02x10^23, so 2 moles will be twice that = 2x6.02x10^23
(sorry if I'm sounding patronising)
yh ur right...dam me !!
7. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
Ok, after how weird the questions in the OCR Biology F211 paper were today, I'm really worried that OCR might have got the same idea for Chemistry Do you think 'let's ask strange irrelevant questions' theme might translate across the subjects
8. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by v :))
okay guys. I'm just confused now, lol :|
Sorry, I wasn't sure how the equation goes.:/
9. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by v :))
okay guys. I'm just confused now, lol :|
yh Holz8888 is right
10. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
i think something on diamonds is going to come up.
11. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
c'mon people try answer my question,.....i wanna see if everyone else has revised eh ?
12. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by salma25)
i think something on diamonds is going to come up.
yh....maybe something like "does diamond dissolve in polar or non polar solvents and why"
13. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
is the no becuase the covalent bonds are too strong there is a lot of energy required to break it

i think is going to be more on the structure...
14. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by Man-Utd)
c'mon people try answer my question,.....i wanna see if everyone else has revised eh ?
Do you mean the selection of questions you gave?
15. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by Man-Utd)
k everyone...let me ask u all a question.....

what products are formed when chlorine Cl2 reacts with water....c'mon, you all gotta know it
HClO + HCl
16. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
U know what wkd be funny? If they tested the 'how w
Science works part' so by that I mean, when it asks about JJ Thomas and Mendeleev and the gang and stuff. I bet it'd be nsanely low grade boundaries then.
17. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by AlligatorSky)
HClO + HCl
Yes

and...what is the name of the HClO ? c'mon
18. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by AlligatorSky)
HClO + HCl

Ah damn, which part of the book is this but on btw? And the chemistry exam is in the morning right?
19. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
(Original post by Man-Utd)
Yes

and...what is the name of the HClO ? c'mon
Ima take a random guess and say bleach
20. Re: OCR Chemistry F321 Exam. - [Next Tuesday[
what i thought it was in the after noon

page 93

## Step 2: Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank

this is what you'll be called on TSR

2. this can't be left blank

never shared and never spammed

3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

2. Slide the button to the right to create your account

You don't slide that way? No problem.

Last updated: December 6, 2012
Useful resources

## Articles:

Study Help rules and posting guidelinesStudy Help Member of the Month nominations

## Groups associated with this forum:

View associated groups
Study resources