- Reaction score
I have a question. PLEASE HELP. TOMORROW IS MY EXAM. Why is the answer C ?
the link doesnt workYou can also ask in the A level forum btw.
Here you go...
AS-P2 topicals for Biology here and here.
P4 topicals for Biology here and here.
Other Biology A level things:
^ AS paper 1 Notes by My Name read full posts and note down the mistakes!
^Revsion guide :
^AS classified past paper 2
^ AS paper 3
^A2 paper 4 solved and notes
^A2 paper 5 tips
I hope that helps.
if XY is moved horizontally in any direction, no magnetic field lines will be cut therefore no change would be observed on the pointer.
(i) Fig.10.3 the coil is perpendicular to the magnetic field , so the e.m.f is at its maximum
I am not really sure but I guess we should add their masses (as they will be joined together) and then divide 0.16 (as momentum before the collision is equal to the momentum after the collision) by 0.8 (the sum of their masses) to get the speed(velocity) to be 0.2m/s
Thank you very much sir, for helping me again, god bless youmole=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