A chemical engineer must report the average volume of a certain pollutant produced by the plants under her supervision. Here are the data she has been given by each plant:
plant
volume of
pollutant
Macon
0.269 L
New Salem
9.071 L
Pitt
4.53 L
What average volume should the chemical engineer report? Be sure your answer has the correct number of significant digits.

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /

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