How many sodium ions in 2.00 mol of nacl

1.20 x 10^24

Explanation:

This question seeks to test the understanding of mole concept where the number of particles (ions, atoms or subatomic particles) in one mole of any substance is equal to avogadro's number (6.02 x 10^23).

1 mole of NaCl will dissociate in a solution as follow

NaCl →Na+ + Cl-

Hence, 2 moles of NaCl will dissociate as follow

2NaCl → 2Na+ + Cl-

From the above, 2 moles of NaCl will dissociate to give 2 moles of sodium ion (Na+)

The number particles present in 2 moles of Na+ is

2 x 6.02 x 10^23 = 1.2 x 10^24

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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.