Here's how to calculate the concentration of the NaCl solution:

1. Convert grams to moles:

* The molar mass of NaCl is approximately 58.44 g/mol.

* Divide the mass of NaCl (1.00 g) by the molar mass to get the number of moles:

1.00 g NaCl / 58.44 g/mol = 0.0171 mol NaCl

2. Calculate molarity:

* Molarity (M) is defined as moles of solute per liter of solution.

* Convert the volume from mL to L: 100 mL / 1000 mL/L = 0.100 L

* Divide the moles of NaCl by the volume in liters:

0.0171 mol NaCl / 0.100 L = 0.171 M

Therefore, the concentration of the NaCl solution would be 0.171 M (molar).