PLEASE ANSWER ASAP!THANK YOU SO MUCH If litmus paper is dipped in an acidic solution, what will happen?

A. The solution will turn blue.
B. The paper will turn red.
C. The solution will turn red.
D. The paper will turn blue.

the paper will turn red

Explanation:

thats what happens to litmus paper when it is in an acidic solution

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