carbon dioxide gas diffuses through a porous barrier at a rate of 0.20 ml/minute. if an unknown gas diffuses through the same barrier at a rate of 0.313 ml/minute, what is the molar mass of the unknown gas?

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

answerto predict;

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

hope this : )

is it d? cause im still confusion