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chem mcq questions

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ayesha.:
thnk you !

CHEMMASTER6000:
 ;D

highly_ambitious:
m/j 2008 qn 6 and 10...plz

CHEMMASTER6000:
not sure about 6 will furthus contemplate later.

but for 10 : basically you draw a hess cycle to stated formation of tio2 = =-940 and formation of c0 is -110
but there is 2 co

so using hess cycle you should get the number -(-940)+ 2(-110)= +740

highly_ambitious:
but the answer is +720

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