What about oct//nov
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CIE 2012 Oct/Nov discussion!!!
- Thread starter pooja9897
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Guys....... I got a question..... Why is the density of pure copper metal high????
Thanks in advance...
Thanks in advance...
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Yyyyyour score is 81.625.....chck out d gt for mj 2012 den...
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since it has only one type of atoms, they are arranged in a regular lattice (similar to that of the solids)Guys....... I got a question..... Why is the density of pure copper metal high????
Thanks in advance...
But when there are impurities, the lattice id disturbed, different sized molecules enter which may be bigger in size but say the same mass.....so volume increases and mass (either stays same or sightly increases)..thus ratio M/V fall for impure copper....
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Its very similar to our Oct/Nov
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A lil higher...may be 4 or 5 mrks
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Yes, but similar
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4 or 5 marks can make a huge difference.. specially in maths where the thresholds are generally high.. compared to science..
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Really! I never knew that.
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http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Mathematics (0580)/0580_w11_gt.pdf
hope its not somethin like this
hope its not somethin like this
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Threshold depends a hell lot on the difficulty of the paper....Since pprs have been simple the gt has to be high irrespective of the comparison of any other subject
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Guys can anyone help me with question 3 in paper 32 oct 2010 chemistry 0620? HOW DID THEY GET THE AVERAGE REACTION RATE?
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Well in the first 20 seconds, 48 centimeters cubed of oxygen was given off.
Rate=volume given off, divided by time. Which is 48 divided by 20.
this equals 2.4 centimeters cubed per second
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Bingo.!!! Right Answer
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I'm sorry but can you please explain how did they get 0.6 for 40 sec and 70 cm cubed?