Since the hybridization of the central atom is usually the only factor needed to determine molecular shape, you can simplify by considering only the hybridization of the central atom. Using this simplified method, the OO atom of CO2CO2 would bond with one of its p or s orbitals. Use valence bond theory to devise a hybridization and bonding scheme for CO2CO2.

i'm pretty sure it is letter c.) car

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