To calculate the density of the sodium chloride NaCl sample, we use the formula:Density = Mass / VolumeGiven the mass of the sample is 5.0 grams and the volume is 2.0 mL, we can plug these values into the formula:Density = 5.0 grams / 2.0 mL Density = 2.5 grams/mLSo, the density of the sodium chloride sample is 2.5 grams/mL.