What is the total number of moles of NaCl(s) needed to make 3.0 liters of a 2.0 M NaCl solution? *

6 moles of NaCl are needed to make 3.0 liters of a 2.0 M NaCl solution.

Explanation:

A 2M solution means that there are 2 moles of solute (NaCl in this case) in 1 liter of solution:

1 L solution2 moles of NaCl

3 L solutionx= (3 L solutionx2 moles of NaCl)/1 L solution= 6 moles of NaCl

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.