Physics, Chemistry and Biology: Post your doubts here!

[❤Nouran❤]

Hello everyone, I need some help, can anyone please give me notes for Physics, Chemistry and Biology, thanks

Here are some I use. Hope they r beneficial

 

[Agent 47]

Here are some I use. Hope they r beneficial

thank you very much sir I really appreciated, god bless you

 

[Agent 47]

mole=volume x concentration
volume=mole x 24


4(c)(i) 0.002 (mol); 0.1 x 0.02dm3 (e.g 20cm3/1000)
4(c)(ii) 0.001 (mol); 0.002/2 (becuz its 2H2O2:1O2 SO 2:1)
4(c)(iii) 0.024 (dm3); 0.001 x 24
4(c)(iv) no change/ no effect; (as catalysts don't affect equilibrium and thus the volume of the reactants-it just speeds up the reaction)
4(c)(v) 0.048 (dm3 ); 0.024 x 2 (as concentration is doubled )-e.g 0.1mol/dm3 x 2 = 0.2 mol/dm3

Hope it helps
Good luck!

Thank you very much sir, for helping me again, god bless you

 

[Agent 47]

hey guys need some help in this question, thanks in advance

 

[Agent 47]

And I had some difficulties in this question too, can someone please help, well thanks in advance

 

[Agent 47]

and how do we do this too, thanks is advance

 

[Agent 47]

and suggestion for this question, well thanks in advance

 

[azfarhassan772]

All the circled questions

 

[azfarhassan772]

Can any share biology as level notes, that are not of z notes

 

[oathbreakerxo]

th

Can any share biology as level notes, that are not of z notes

this is the group for o level... brother you're in the wrong group

 

[Agent 47]

th

this is the group for o level... brother you're in the wrong group

Thanks for the advice but my exams are done, and I am done with IGCSE, joining O levels soon (lol)