How many moles of sulfur are present in 3.0 moles of Al2(SO2)3 ? Group of answer choices

1.0 moles of sulfur

9 moles of sulfur

3 moles of sulfur

10 moles of sulfur

you did not give any options thus this is the best answer i can give to you with this little information you have given

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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