Why did Wegener study fossils as part of his search for evidence of continental drift? If continents were once joined together, all the organisms would still be alive on all continents today.
If continents were once joined together, the same organism would have lived on different continents.
If continents were once joined together, the same organism would have gone extinct on one of the continents on which it lived.
If continents were once joined together, organisms would have moved onto only one of the continents when they separated.

58750.08068 is the answer i think

personal, she chose to do it.

b. is the answer hoped i        

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