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  1. M

    Physics, Chemistry and Biology: Post your doubts here!

    Here i drew this up for u . Notice that Chlorine still has its 7 electrons, oxygen has its 6 electrons, carbon still has its 4 electrons. that you must show. Also that each Atoms has a total of 8 electrons (stable) = as some of its own + the ones shared. Double bond : Pair of electrons shared...
  2. M

    Physics, Chemistry and Biology: Post your doubts here!

    In physics macroscopic properties ( as of what i know) Are properties such as Density, Pressure (of Gases), Volume (of gases/liquids), Length (of solids) and Resistance (of wires) which change with change in temp (they could be measured, to measure temp. ex thermometer uses volume of mercury)...
  3. M

    Physics, Chemistry and Biology: Post your doubts here!

    Physics : an object is in equilibrium when 1. Total forces in one direction = total forces on the opposite direction or 2. Total Clock Wise moment = Total Anti Clock Wise moment chemistry : (Reversible reactions in equilibrium) Rate of Forward reaction = Rate of backward...
  4. M

    Physics, Chemistry and Biology: Post your doubts here!

    Im in 9th grade, i dont my IG's till next year, but our school exams are from IG past paper (for preparation).
  5. M

    Physics, Chemistry and Biology: Post your doubts here!

    Physics: http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_w08_qp_1.pdf Im having trouble understanding question 12. How can it be B?
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