Calculate the concentration of the sodium chloride solution in units of g/mLg/mL and give the answer in scientific notation with the correct number of significant figures.

A sodium chloride solution was prepared in the following manner:

A 25.0 mLmL volumetric flask (in the figure below) was placed on an analytical balance and found to have a mass of 35.6783 gg.

Sodium chloride was added to flask and the mass of the solid + flask was 36.1943 gg.

The flask was filled to the mark with water and mixed well.

2.0640010^2g/mL 2.0610^2 g/mL 2.064010^2 g/mL 0.021 g/mL 0.0206 g/mL 2.06410^2 g/mL 0.02064 g/mL 0.0206400 g/mL