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Respected sir,
You are talking about announcement still no new announcement are there that’s the reason I messaged you and waited for reply in forum more than 48 hours then I messaged you on social media.
Secondly, you mentioned before that the classes this week will be extra on Mon, wed, Fri to cover missed lectures and also mentioned the time 9 pm on form that’s the reason I was joining class yesterday and you messaged that it will be on 10pm so I waited on 10pm Also but now you are asking there was no class it is only on tues, Thursday, Saturday. Why?
Sorry for social media messages I was too much concerned and you was not even replying on forum that’s why my father said me messaged there.
And sir please check the announcement section on my course because no new announcements are coming there.
Thankyou -
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1. PV=nRT P IS PRESSURE in pascals, V IS VOLUME in m3, n is moles, T is temperature in kelvins.
2. heat is provided to the particles they gain kinetic energy and start moving faster and coliides with each other and with the walls of container which produces pressure on the walls.
3. particles have negligible volume nand no intermolecular forces.
4. n=PV/RT FINAL ANSWER= 1.005= 1.01 mol
5.M=1.76g R=8.31 T=300k P=101000 V= 0.0012m3 mr=mRT/PV final ans= 36.2
6.a] because at high pressure they take large portion of container and less space empty so they collide with walls which create high pressure.
b] at low pressure the particle size is small and most of container is empty so it does not interfere with container’s wall.
7. it is bonded with many strong ionic bonds and strong electrostatic forces between.
8. because mgo has more charge then nacl so it has high electrostatic forces between the bonds
9. iodine has simple covalent bonding and molecular structure
ice has strong covalent bonding and simple molecular structure.
10 a because it has giant covalent structure which has strong covalent bonding with carbon atoms
b because it has free moving electrons.
11. copper has a metallic bonding and a giant mettalic structure which has strong electrostatic forces. copper has a large number of delocalised electrons in its structure which conducts electricity.
12. because it has strong ionic bonding and strong electrostatic forces difficult to overcome . because in solid form they are packed together can t move and in molten there there are free moving ions whuich conduct electricity
13. they have strond covalent bonds but weak intermolecular forces. low energy is required to overcome them.
14. because it has giant covalent structrure with covalent bonding . it has giant lattice in which each silicon is strongly bonded with four oxygen . so it is difficult to break and cant dissolve bcz water can t break these strong bonds.
15. giant mettallic strucTURe AND METALLIC BONDING
16. the energy of reaction at constant pressure.
17.a] negative
b] positive
18. because energy is needed to overcome the forces so bonds is broken and when energy is loss to surrounding the bonds formed.
19. reaction is exothermic. because the energy is released to the surroundings so the temp of the surroundings increases.
20.hess s law states that the total enthalpy change for a reaction is independent of the route taken, provided the condition are same.sir sorry for late because of load shedding . so now the class will taken at thursday or now,
and sir please tell that in the forum i can post images or pics bcz it is very difficult to type especially equations and calculations questions. -
Dear Sir,
Firstly, i want to clear that i have completed the test in 30 to 35 mints and waited for you in the class and messeged you also but you don’t reply. I waited for you and then thought that it will check in the next class.Secondly you haven’t talk to me before about assignments completion or practice question that firstly they will be completed or submitted then next class will taken. i waited for you yesterday in the class for much time but it didn’t started.
I want to know that i have to submit that test on watsapp because i waited for you that when you will restart the class and i will do accordingly that what you say. I have an query that I have to submit the practice questions of the topics on the assignment section or in the assignments there will be seperate and i have to just click on complete option after completing practice questions of that topics.
It was an misunderstanding and lack of knowledge so i apologize for that.
so please answer in detail that how to do that so the next class on tuesday will proceed i will submit it before the class and it will held accoordingly.
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