-
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
-
-
Chemistry: Post your doubts here!
write the name u want to tag for e.g snowbrood and do write this code [U S E R=1]Name[/U S E R ] no spaces i am using this so that u can write this code -
-
-
-
-
-
Chemistry: Post your doubts here!
Sweetjinnah i dont know how to tag lolz even i want to learn how to tag so do tell me if u ever figure it out -
Chemistry: Post your doubts here!
hehe thanks i am glad that i could help -
Chemistry: Post your doubts here!
Ca + 2CH3COOH ----> Ca2+ + 2CH3COO- + H2. as u know that ch3coo- u need two ch3coo to balance Ca so u get 2*(CH3COO)Ca c4h6O4 use first equation to find the empirical formula for other two equations u will find only first one is correct. -
Chemistry: Post your doubts here!
for q11 s11 Experimentally, moles of C present = 3x10^-3 Molar mass of AlxCy = 27x + 12y Moles of AlxCy present = sample mass / molar mass = 0.144 / (27x + 12y) look if we want to find the number moles of element in a compound we multiply the number of moles of that compound and number of moles... -
Chemistry: Post your doubts here!
for W11 q30 there are three different isomers of alcohol possible 1. 1-butanol 2. 2-butanol 3 trimethyl ethanol. for 1 u will get ch3ch2=ch2 for 2 u will get ch3ch=chch3 for 3 u will get CH3)2-C=CH2 so only 2 wil get u cis trans isomers so only 1 is correct which is option A. -
Chemistry: Post your doubts here!
for w10 q7 At constant T, PV is also constant. In a mixture, partial pressures add to be the total pressure. the total volume will be 15 dm^3. This is what you get by adding the volume of gas 1 to the volume of gas 2. Since the flasks are connected, the overall volume will be the sum of the... -
Chemistry: Post your doubts here!
for q8 mj2010 just do the mole ratio: Mass/Relative molecular mass and check which satisfies the equation 2.92/RMM= 5.287/RMM like for example A 2.92/137 =5.287/(137+35.5*2) l.h.s does not equal R.H.S for q 12 If u acidify the pool, the equlibrium would shift to RHS to make more OH- so conc... -
Physics: Post your doubts here!
thoron's mass is 220 u can check that in internet i bet that there is some mistake in this question maybe some priting mistake. mass is inversely proporntional to k.e mass k.e 4 Ea 216 x x= (Ea*4)/216 x=Ea/54 -
Chemistry: Post your doubts here!
i am afraid u are wrong aqueous bromine vapours or gaseous bromine vapours both are brown or orange... gaseous bromine is never purple but yeah aqueous iodine is orange -
Physics: Post your doubts here!
hehe theres already an answer for that so ;) -
Mathematics: Post your doubts here!
i dont get the second part the angle one. answer is 119.9 or60.1 -
Mathematics: Post your doubts here!
Prove that if (c-b).a=0 and (c-a).b=0, then (b-a).c=0. Show this can be used to prove the following geometric results: 1) The lines through the vertices of a triangle ABC perpendicular to the opposite sides meet in a point (the orthocentre) 2) The tetrhedron OABC has two pairs of perpendicular...