What is the net ionic equation for the reaction between CoCl2 and an alkali hydroxide? A. Co2+(aq) + 2OH-(aq)  Co(OH)2(s)
B. Na+(aq) + Cl-(aq)  NaCl(s)
C. Co3+(aq) + 3OH-(aq)  Co(OH)3(s)

- both b and d.

-since b and d are the closest coastlines then that makes it the most affected.

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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.

i'm pretty sure its b i might be wrong though!