Which of the following is true about paramagnetic atoms? a.
They are weakly attracted to magnetic fields

b.
Neither of these are true

c.
Both of these are true

d.
They have unpaired electrons

it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter  

може ли да зареждате повече информация, моля

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