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Chemistry: Post your doubts here!

itallion stallion

itallion stallion

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Plz explain October november 2012 paper 53 q1ai.why will the pressure increase when by decreasing volume the no of gas molecule hitting the surface will decrease.?
 
goodluckayesha

goodluckayesha

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itallion stallion said:
Q3c take electrode potential equation from data booklet and simply balance the electrons on both sides and u will get the equation.for the oxidation state like for example Mno4- the oxidation state of Mn will be (X-8=-1)just change the sign of the value of X after calculating value of X.
Q4c bond breaking energy-bong making energy=total energy of reaction.
Cl-Cl and 3F-F bond will break to form 6 Cl-F bond as in one mole of ClF3 there are 3Cl-f bond.
3(158)+244-6Cl-F=-328.
Solve it and u will get the answer.
Click to expand...
i cn solve the oxidation no.s but the balancing ok anyways
i tried solving but the answer is coming out wrong altho even the ms tells this procedure if possible write the steps
 
sadiaali

sadiaali

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21 Including structural and stereoisomers, how many isomers are there of C2H2Br2?
A 2 B 3 C 4 D 5

9701/13/O/N/13
Can anyone explain me
 
Haya Ahmed

Haya Ahmed

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♣♠ Magnanimous ♣♠ said:
There are definatly only 4 C=C in the aliphatic side chain, which is what the question implies it wants the answer to.... However if you include the C=C in the cyclohene ring then you get 5 C=C in the molecule. So I'd answer is 5 C=C
and now for cis the R1 and R2 comes on horizontal and not diagonal.
Click to expand...
I didn't get it :( can you please try to make it more briefly ... and btw how did you know that we have 4C=C bonds in that thing aliphatic side and what do you mean by it ?! and why added omg ! .. :O
 
M

Mohammed salik

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