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Biology; Chemistry; Physics: Post your doubts here!

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Two different hydrocarbons each contain the same percentage by mass of hydrogen.
It follows that they have the same
A empirical formula.
B number of isomers.
C relative molecular mass.
D structural formula.
 
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hmm.. hopefully, gud preparation! Inshallah, i will get good grades! syed1995
and lets see what CIE has to throw at us! lets show them the power of XPF! :cool:
 
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hmm.. hopefully, gud preparation! Inshallah, i will get good grades! syed1995
and lets see what CIE has to throw at us! lets show them the power of XPF! :cool:

ashhab bhai :) .. In Energy change ..

If Ep is less than Er ... Reaction is Exothermic ... Delta H = Negative

if Ep is greater than Er .. Reaction is Endothermic .. right? Delta H = Positive
 
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ashhab bhai :) .. In Energy change ..

If Ep is less than Er ... Reaction is Exothermic ... Delta H = Negative

if Ep is greater than Er .. Reaction is Endothermic .. right? Delta H = Positive

yes! delta H = Ep - Er, no matter what! and in endo, Ep is greater!
paper denay nahin jaana kia??? :p
 
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yes! delta H = Ep - Er, no matter what! and in endo, Ep is greater!
paper denay nahin jaana kia??? :p

Jaayeingay, Jaayeingay .. Jaldi kis baat ki hai :D

Anyways yeah, Delta H = Ep-Er

Endo = R+Heat ---> P
Exo = R ----> P + Heat
 
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