If a sample of Iron (III) sulfate has 3.25 grams of sulfur, how many grams are in the total sample? (1 Point)
Fe2(SO4)3
Fe = 55.8458
mol
S = 32.06
8
mol
0 = 15.999
8
mol

answerleaving cheese out to get moldy;

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

answeridentity;