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  1. T

    Chemistry: Post your doubts here!

    An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, there was 0.44mol of Ag+(aq) in the mixture. Ag+(aq) + Fe2+(aq) --> Ag(s) + Fe3+(aq) What is Kc? A. 0.35 B. 0.62 C. 1.62 D. 2.89 I got C as my answer but...
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    Chemistry Help

    I know I'm meant to post my question in that thread but no one ever answers my questions there and I have my exam tomorrow so please help me. An aqueous solution was prepared containing 1.0mol of AgNO3 and 1.0mol of FeSO4 in 1.00 dm3 of water. When equilibrium was established, there was...
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    tell me the tests... tollens , felings, DNPH, Iodoform ,

    aldehydes-tollens and fehlings (or bennedicts) tollens-silver mirror precipitate appears, fehlinghs and bennedicts-from blue solution to brick red precipitate carbonyls (aldehydes and ketones)-2,4-DNPH- yellow or orange or red precipitate appears...
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    Decomposition of H2O2

    Thx for the help! :)
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    Decomposition of H2O2

    Is the decomposition of h2o2 reversible?
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    Physics: Post your doubts here!

    I have a problem doing no.4 c) of the w07 paper2. I've read the mark scheme but I still dont understand. Can anyone help explain it to me. P.s You have to do part b) before part c) http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w07_qp_2.pdf...
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    Physics Question help?

    Thanks!!! I forgot that formula so I couldn't do it
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    Physics Question help?

    Can anybody help me with this??? Is it even possible to do this... The engine of a car generates a power of 35 kW at a maximum speed of 144 km h-1. Calculate the force acting against the motion of the car at this speed.
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    Physics Help

    Oh thx for that I get it now. Correct me if I'm wrong, A is wrong because in A, kinetic energy is not conserved as total Kinetic Energy after the collision becomes half of its original, but in D it is conserved
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    Physics Help

    http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_w06_qp_1.pdf Could someone help me out with Q11? I know that its either A or D because the momentum before= the momentum after, but the answer is D, can anyone explain why???
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    Physics paper 1 May/June2011 discussion

    Maybe u had a different question, i was doing variant 2. No offence but I still think im right. Good luck for ur paper 6! im doing paper 5 instead.
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    Physics paper 1 May/June2011 discussion

    Which variant were u doing? My question had same heights for both barometers
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    Physics paper 1 May/June2011 discussion

    I think for the barometer question cambridge made a mistake. There are two answers. They have made mistakes in physics igcse papers before, there was a mistake in a previous year which cie admitted in the mark scheme. The pressure at X and Y are the same because pressure=density x gravity x...
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    CAT test question................plz solve!!!!

    source Yahoo answers: Answer is 143547 First two are 7 * 2 =14 (product of the first two numbers) Second two are 7 * 5 =35 (product of the first and third numbers) Third two are 14+35 - 2 = 47 (sum of the above two minus the second number in the question)
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    wat grade do i get

    Based on last june's grade treshold, u got around a B
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    wat grade do i get

    What subject is this?
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    help need some answers

    Sounds pretty fake to me, where did u get that news from? Are u referring to all subjects or just one of them? 95 for A is really unlikely for any subject, just check the grade thresholds for previous years. They usually end with "gt". For example physics 2010 June thresholds are in the file...
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    Physics Mark Schemes???

    You can find it in many igcse physics mark schemes. For example Q9. c) of http://www.xtremepapers.me/CIE/Cambridge%20IGCSE/0625%20-%20Physics/0625_s10_ms_33.pdf Page 2 explains what A marks and B marks are but not NB marks
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    Physics Mark Schemes???

    What is a NB mark in physics mark schemes?
  20. T

    Gender

    In Between!!! Lol kidding, Im a boy
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