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Calculate DeltaH(f)^(@) of C(6)(s) from ...

Calculate `DeltaH_(f)^(@)` of `C_(6)(s)` from the following data:,
`DeltaH_(comb)` of `C_(6)H_(12)O_(6)(s)=-2816kJ" "mol^(-1),DeltaH_(f)^(@)` of `CO_(2)(g)=-393.5kJ" "mol^(-1) and DeltaH_(f(H_(2)O))^(@)=-285.9kJ" "mol^(-1)`.

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`-1260kJ" "mol^(-1)`
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