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Chemistry P1 Challenging Questions Preparation

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1ajia1

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white rose said:
can u attach the Hess cycle with the calculations...
Click to expand...

I have it on my mobile and I am using xtreme from laptop now.
see you just simply multpily 3 by -286 then - (- 1586) so its addition take it to other side subtract and then divide from two
 
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1ajia1

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Student12 said:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s10_qp_12.pdf
Q1(Why is it helium ?) Q5(b), 6(d), 8(d), 28(d), 35(c)
Click to expand...
1 is He because its a noble gas and only has weak forces between the atoms and thats one condition for an ideal gas to have negligible forces.
q5) divide -214/2 ( because formation is for one mole only) divide +38 by 2 and then add them.
Q6) i explained to someone earlier check that
q8) moles of metal equals mole of XCL2 so equate them using moles= mass/mr
2.920/X=5.287/(x+71)
28) its D because it has an optical isomer ( carbon 3) and its cis trans because the functional groups on both sides of the carbon involved in double bonding is different)
 
white rose

white rose

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1ajia1 said:
I have it on my mobile and I am using xtreme from laptop now.
see you just simply multpily 3 by -286 then - (- 1586) so its addition take it to other side subtract and then divide from two
Click to expand...
the prob. is according to my cycle i m nt getting this equation...so canu transfer the pic to laptop and snd it to me..it is vry kind of u
 
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