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Physics, Chemistry and Biology: Post your doubts here!

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ummmmmmm guys can any body help me plz ?
i want a convincing anwer to 'use the kinetic theory to explain the process of diffusion' !!
 
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ummmmmmm guys can any body help me plz ?
i want a convincing anwer to 'use the kinetic theory to explain the process of diffusion' !!
Diffusion is the movement of one kind of particles through another kind due to its kinetic energy (that makes it move).
hope dat helped..
 
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Diffusion is the movement of one kind of particles through another kind due to its kinetic energy (that makes it move).
hope dat helped..
but this question normally would be for 3 marks ,,, so this anwser would be enough !!
but thanx anyway :)
 
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what does the square sign indicates in things like (CH2)2 -CH2-CH3
BREAKING BOND, FORMING BOND, BOND ENERGY AND WHAT IT HAVE TO DO WITH EXOTHERMIC AND ENDOTHERMIC

my unsolved questions remain unsolved, need help
 

Maz

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what does the square sign indicates in things like (CH2)2 -CH2-CH3
BREAKING BOND, FORMING BOND, BOND ENERGY AND WHAT IT HAVE TO DO WITH EXOTHERMIC AND ENDOTHERMIC

my unsolved questions remain unsolved, need help
I am sorry i have no answer for the first question.

For the second,
exothermic reactions involve forming bonds. eg freezing of water, where water molecules lose heat energy and bonds are formed.
endothermic reactions involve breaking of bonds. eg. boiling of water, where water molecules take in heat energy needed to break the bonds.
 
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what does the square sign indicates in things like (CH2)2 -CH2-CH3
BREAKING BOND, FORMING BOND, BOND ENERGY AND WHAT IT HAVE TO DO WITH EXOTHERMIC AND ENDOTHERMIC

my unsolved questions remain unsolved, need help
square signs like what?
 
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Summer 2009 Chemistry Paper 32.
Can anyone teach me the Question Part B in Page number 7? Please help as soon as possible!
 

Maz

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Nitrates nitrites... which metals give nitrates and which give nitrites quickly exam is tomorrow!
Sodium and potassium decompose when heated to their nitrites and oxygen.
lesser reactive metals decompose to form their oxides, nitrogen dioxide and oxygen.
 
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