Please help me answer this Chemistry question??

Posted on 2015-10-21 06:41:00 in Chemistry by GIVS

4HCl (g) + MnO2 (s) ——> 2H2O (l) + MnCl2 (s) + Cl2
(delta)H = -167.7 kJ

a.) What is the concentration of a solution of HCl prepared by diluting 15.6mL of a 1.33 M solution to 32.6 mL?
b.) What is the change in internal energy for the reaction?
c.) How may moles of HCl does 35.5mL of a 0.665 M solution contain?
d.) How much heat is associated with the reaction of the HCl in part c with excess MnO2 in a beaker? Is the heat released or absorbed?

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