When 330. mL of a lead(II) nitrate solution of unknown concentration had an excess of sodium chloride added, 5.3 g of solid was filtered out of the solution. What was the molar concentration of the lead(II) nitrate solution?

beta decay is the answer

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.