Carbon monoxide binds strongly to the fe2+ ion of the haem group of the protein myoglobin. estimate the vibrational frequency of co bound to myoglobin by using the data below and by making the following assumptions: the atom that binds to the haem group is immobilized, the protein is infinitely more massive than either the c or o atom, the c atom binds to the fe2+ ion, and binding of co to the protein does not alter the force constant of the image from custom entry toolbond. (c triple bond o)

the following data on the infrared absorption wavenumbers ( wavenumbers in cm- 1) of molecules are taken from spectra of diatomic molecules, g. herzberg, van nostrand ( 1950):

h35cl 2990

h81br 2650

hi 2310

co 2170

no 1904

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.