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Biology; Chemistry; Physics: Post your doubts here!

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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
Thank you!
 
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And Q12 of the same year

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.
 
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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?
 
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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?

Yes, it's attached at the end.
Shorter method is to just get a rough estimate. I could tell that the mass in (b) was greater than in (c) and (d) by seeing the composition.
Only needed to calculate (a) to be sure.
 
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