the kazillionth time im posting this http://www.xtremepapers.com/papers/... AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4
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)
I'll check it out, hang on..the kazillionth time im posting this http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4
Yes I do!!in the orignal molecule there are 9 double bonds if you count them......................in the residue one chain hai 2 double bonds and 2chains have 1 double bond thus total is 4.....so the bonds that are saturated are 9-4=5
I HOPE YOU GET IT NOW
Ermm,they must all be alkenes yeah? cos Pi bonds are only found in double bonds ..How many isomers with the structure C5H10 have structures involving pi bonds?
A. 3
B. 4
C. 5
D. 6
Why?
ack I donno! I got 1360Kg -_-the kazillionth time im posting this http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4
the equation is N2+3H2----->2NH3the kazillionth time im posting this http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_12.pdf Q4
yepErmm,they must all be alkenes yeah? cos Pi bonds are only found in double bonds ..
wait wait1 how'd you get the moles of H2 as 60 and 48?the equation is N2+3H2----->2NH3
in the start moles of H2=60......... at equlibrium H2 moles=48....thus change in moles=60-48=12
from the equation the ratio of H2:NH3=3:2...............thus moles of NH3 produced would be (2*12)/3=8moles.....
Mass=Mr*moles
Mass=(14+3)*8
Mass=17*8
Mass=136Kg
because Mr of H2=(2*1)=2wait wait1 how'd you get the moles of H2 as 60 and 48?
in such molecules mostly a chiral centre is found is where 3 line join if any chain isnt the same as other 3Hello how do you look for a chiral carbon atom in a cyclic or aromatic compound please? Thx
for 28: u do not write H in skeletal formulahttp://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w10_qp_12.pdf
Q 7 , 8, 12, 14, 22,
28 why isnt it A or C ?
Explain please !
aack thanks.. sorry I haven't done chem in so long.. I was taking the 3 in 3H2 in account toobecause Mr of H2=(2*1)=2
moles=mass/mr
moles=120/2
moles=60
same for moles at equilibrium
What's that reaction involved with KMnO4 and alchohols? I can't seem to understand. Please help me I need an answer desperately
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now