-
We need your support!
We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
Search results
-
Mathematics: Post your doubts here!
i tried it out too and God u're ryt... it doesnt make sense! >__< -
Mathematics: Post your doubts here!
count your blessings my friend count your blessings :') -
Mathematics: Post your doubts here!
Use AB x BC and see if u get the correct answr.. i'm getting i+2j+k for that... [talking about part i ] i think u have to use the vectors where the second alphabet of the first vect and the first alphabet of the second vector are common: AB x BC -
Mathematics: Post your doubts here!
it's Paper 3 FOR SURE *shudders* :P not sure about the vairant though... i think it's 31 but i'm not sure... just check -
Mathematics: Post your doubts here!
Oh hey... i just saw ur post.... wait... i will work on it and see if i can work something out... :P -
Chemistry: Post your doubts here!
it's a matter of the discharge priority stuff in electrlysis... u know the reactivity series of metals that we did in O levels too? so according to that, O2 is discharged in preference to SO4-2 and F- so it is discharged before F2 or SO2... Br2 however is discharged in preference to O2... -
-
We were born to be damned by this world - T.Rao
We were born to be damned by this world - T.Rao- daredevil
- Profile post
-
A level Biology: Post your doubts here!
Ummm.... I'll give this a try... u see if this is right. u know how genes are switched on and off? well if we do not transfer the promoters with the gene then the gene will just be there and not work. e.g. if it is an insulin prduction gene then it will not start producing insulin until it is... -
Chemistry: Post your doubts here!
w.r.t. H2O2 : 0.70/.05 = 1.4/1.0 7/5 = 7/5 w.r.t. H+ : if we consider the conc of H2O2 first and compare it with rate: 0.09/0.05 = 1.8/1.0 9/5 = 9/5 it shows that the rate is changing just because of H2O2 .... which means that however much the conc of H+ changes, it... -
Chemistry: Post your doubts here!
does anyone have AS organic reactions written down all in one place?? also AS inorganic?? -
Chemistry: Post your doubts here!
The reaction goes like this: SiCl4 + 2H2O --> SiO2 + 4HCl -
Chemistry: Post your doubts here!
I think it goes like this: if Na reacts with H2O it gives NaOH so it becomes oxidised. and we know that if an element itself becomes oxidised then it is a reducing agent. similarly if talking about Cl2 then it reacts with H2O to form HCl so it becomes reduced. which means that it is an... -
Chemistry: Post your doubts here!
so how do we decide when we can round off and wen we have to be extra careful about this stuff?? -
Chemistry: Post your doubts here!
yes it is.... especially when u have collected data and stuff like in prcticals or practical related questions. mostly we use significant figures when doing calculations like maybe finding the Kc or sth.... if it is called for however u ought to use the no of significant given in the question. -
Chemistry: Post your doubts here!
normally we are required to write in 3 s.f. unless otherwise stated in the question. -
Chemistry: Post your doubts here!
A levels has a percentile system. the threshold is decided ever year separately accordingly to the results -
Physics: Post your doubts here!
how did u reach B0/Bn = mo/mn ?? -
Chemistry: Post your doubts here!
Hey I have this question and answer. You can adjust your answer accordingly: Q. Describe and explain the trend in the solubility of the sulfates of the group II elements. Ans. - Solubility decreases (down group II) [1] - lattice energy decreases [1] - solvation/hydration energy (of cation)...