Which of the following best describes the role of the Supreme Court in protecting Americans' civil rights and liberties? OA. It creates laws and regulations designed to protect the rights of Americans.
ОВ.
It punishes people and institutions that violate civil rights and liberties.
OC.
It decides if any constitutional rights were violated in a given situation.
OD.
It determines how to balance the competing rights of different individuals.
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OB

Explanation:

 it protects civil rights and liberties by striking down laws that violate the Constitution.

the awnser is group 12

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