ASAP, This question is 30 points. Please help me! 1. What jumps during an electromagnetic charge?
2. What caused the styrofoam to be attracted to the rod?
3. Which direction do magnetic field lines move?

1. A magnetic field

2. the former piece will lose electrons take on a positive charge and the latter piece will gain electrons and take on a negative charge.

3. parallel (im not really sure)

Explanation:

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