ZnCl2 is used in soldering flux, an alloy used to join two metals together. Determine the moles of Cl- ions in 2.50 mol ZnCl2.

5.00 mol Cl-

0.500 mol Cl-

1.75 mol Cl-

15.0 mol Cl-

Answer : The number of moles of ions are, 5.00 mole.

Explanation :

When 1 mole of dissociates then it gives 1 mole of ion and 2 moles of ions.

As we are given that there are 2.50 mole of .

Now we have to determine the number of moles of ions.

As, 1 mole of dissociate to give 2 moles of ions.

So, 2.50 mole of dissociate to give moles of ions.

Therefore, the number of moles of ions are, 5.00 mole.

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a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.