Which of the following statements are true? Skepticism is a quality that scientists need.
Science is always a positive force.
Animal testing is no longer practiced in the United States.
Most scientists work in laboratories.
Science can influence technology and technology can influence science.

Most scientists work in laboratories.

Science can influence technology and technology can influence science.

Skepticism is a quality that scientists need.

Explanation:

-without skepticism, a scientist wouldnt have any interest in his/her job and we wouldnot have answers

-science can be a negative force

- animal testing is still unfortunately practiced in the US

-most scientist do work in laboratories

-Science can influence technology and technology can influence science

mark as brainliest :)

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