Consider the statement: “The following report presents the results of our laboratory tests, which support the conclusion that our new treatment for acne is safe and effective with minimal possible side effects.”

What questions should a person ask themselves to determine if this scientific study is reliable?
What does the acne medicine look like?
What does the acne medicine smell like?
Were laboratory tests conducted by the same company that produces the acne medicine?
Were laboratory tests conducted in a laboratory with more than 100 employees?

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

pie chart because it is in percents ( % )