Which of the following is an example of parasitism? a. birds feed off the flies that swarm around buffalo b. a rabbit population is the main source of food for a certain fox population c. ticks can attach and live on the blood of bison d. in their attempt to obtain nectar from blooms, bees pollinate a population of flowers plz quck and only answer if you know the answer

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