Year 12s: what will be the first way you research your future options? >>

Higher chemistry past papers could you check my past paper answers? thanks :) :) :)?

ah4p

https://www.dropbox.com/sh/r914rdr3fcn92q9/b88Rcdwn_E

you don't need to to do them all :smile:

thanks soo much any help at all is appreciated :smile:

prelim tomorrow :frown:

(edited 10 years ago)

Reply 1

TSR Learn Together

Official Rep

Hi there,

While you're waiting for an answer, did you know we have 300,000 study resources that could answer your question in TSR's Learn together section?

We have everything from Teacher Marked Essays to Mindmaps and Quizzes to help you with your work. Take a look around.

If you're stuck on how to get started, try creating some resources. It's free to do and can help breakdown tough topics into manageable chunks. Get creating now.

Thanks!

Not sure what all of this is about? Head here to find out more.

Reply 2

sophieshoesmith

Lookin just at questions 10

a)- add Fullerenes are spherical or tubular
b) wrong - why x100? 2.88/720 = 0.004 moles
c) wrong - 0.004*3*39 =0.468g

and 11
a) Correct
b) Correct
c) Citric Acid has low pH which denatures the enzyme that causes the browning

and 14 looks correct but the last bit, Methanal is Formaldehyde - so used for preserving specimens for example
and 9 looks correct but I would guess (as I'm only GCSE level myself) that for 9a(ii) its 1,4-diaminobenzene