The density of the substance can be calculated by dividing the mass (31 g) by the volume (68 cm3). So, density = mass/volume = 31 g / 68 cm3 ≈ 0.46 g/cm3.
68-31 = 37
3
503 divided 68 = 7.397058823529412
68 divided by9 = 7.555555555555555
68 divided by 3 is 22.67
0.1176
0.0029
7
0.68
68
68 divided 4 = 17