A student measured qrxn for the reaction of 0.398 g of a metal, X(9(molar mass = 97.42), with HCl(ag) to be -902 J. Assuming this metal reacts in the same manner as magnesium, what is the AH° (in kJ/mol) for this metal's cation in solution, i.e., X2+ (ag)? Report your answer to the correct number of significant figures and only include the numerical answer (no units).

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Chapter1: Chemical Foundations
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A student measured qnxn for the reaction of 0.398 g of a metal, Xa(molar mass = 97.42), with HClag to be -902 J. Assuming this metal reacts in the same manner as magnesium, what is the AH°; (in kJ/mol) for this metal's cation in solution, i.e., X2* (og? Report your answer to the correct number of significant figures and only include the numerical answer (no units). 

 

Question 10
A student measured qrxn for the reaction of 0.398 g of a metal, X(9(molar mass =
97.42), with HCl(ag) to be -902 J. Assuming this metal reacts in the same manner as
magnesium, what is the AH°; (in kJ/mol) for this metal's cation in solution, i.e., X2+
(aq)? Report your answer to the correct number of significant figures and only include
the numerical answer (no units).
Transcribed Image Text:Question 10 A student measured qrxn for the reaction of 0.398 g of a metal, X(9(molar mass = 97.42), with HCl(ag) to be -902 J. Assuming this metal reacts in the same manner as magnesium, what is the AH°; (in kJ/mol) for this metal's cation in solution, i.e., X2+ (aq)? Report your answer to the correct number of significant figures and only include the numerical answer (no units).
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