The tide of public opinion! CGTN, a think tank affiliated with China's China Media Group, has released a survey to global Netizens in six official languages of the United Nations. As many as 83.1 percent of respondents supported the WHO's investigation into the origin of the virus in the U. S. The eyes of the people are sharp.

it is a solid

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

you need to stop taking that class