Determine the number of moles of NaCl in the solution.

Measured Mass of NaCl: 11.69g
Measured Vol of Water: 100mL
Molar Mass of NaCL: 58.44g/mol

11.69gNaCL/58.44g/mol = 0.20 mol NaCl

Do I then to multiply my answer by 100ml?
0.20 x 100=20.00mol NaCl?

No. You were asked for mols. That's mols = grams/molar mass and that's what you have done. Placing it in water has nothing to do with the number of mols. For example, suppose you have a pound of bananas and each banana weighs 1/4 pound. That means you must have four bananas in that bunch. Placing them in a bucket of water doesn't change the number of bananas. There are four of them in or out of the water.

No, you don't need to multiply your answer by the volume of water (100 mL) in this case. The number of moles of a substance is determined by dividing the measured mass of the substance by its molar mass.

In this case, you have already correctly calculated the number of moles of NaCl as 0.20 mol NaCl. This calculation was done by dividing the measured mass of NaCl (11.69 g) by its molar mass (58.44 g/mol).

The volume of water (100 mL) is not directly related to the number of moles of NaCl. It is only used to measure the concentration of the solution, which is typically expressed in terms of moles of solute per liter of solution (mol/L or M).

So, the correct answer is 0.20 mol NaCl.