How? :/It's exothermic.
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How? :/It's exothermic.
How? :/
Thank you!in graphite atoms are arranged in layers while in diamond are closely packed
in graphite each carbon atom is bonded to 3 other atoms while in diamond each is bonded to 4 other atoms
in diamond atoms are tetrahedrally arranged while in graphite are arranged in rings/hexagonal arrangement
graphite have some delocalised/mobile electrons while diamond dont have mobile electrons
diamond have strong covalent bonds between all the atoms while graphite contains weak forces between the layers
oh, my bad...Catalyst enhances both the back and forward reaction so equilibrium remains the same
Please explain http://papers.xtremepapers.com/CIE/Cambridge International O Level/Chemistry (5070)/5070_s11_qp_21.pdf
Q.B6(e)(ii) and B6(e)(iii).
can you give some examples on dissolving reaction?
And Q12 of the same year
Same paper B7(b) and (d)(i)
And Q12 of the same year
Is 24 b??http://papers.xtremepapers.com/CIE/...al O Level/Chemistry (5070)/5070_s05_qp_1.pdf
i've done this paper..
question no. 13, 18, 19, 22, 23, 33, 37 and 38 were wrong ! i got 32/40.. bad attempt :/
But that takes so much time. Isn't there a faster way to go about it?? Will the periodic table be given to us for paper 1 brw?Use this formula,
Mass of Sulphur = % composition * 10 = Mass of sulphur/Molar mass * 10.
For (a) it is, 32/90 * 10 = 3.55 g
For (b) it is, 64/120 * 10 = 5.33 g
For (c) it is, 64/160 * 10 = 4 g
For (d) it is, 32/239 * 10 = 1.34 g
Answer is B.
But that takes so much time. Isn't there a faster way to go about it?? Will the periodic table be given to us for paper 1 brw?
acha poutey jeeDaadi jaan. Aap bhi na!
Z displaces W.
W displaces X.
X displaces Y.
So, Reactivity is Z>W>X>Y.
Answer is C.
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