You need the mass and volume to calculate the density
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Density = Mass/Volume = 25g/5ml = 5 grams per mL.
Density = Mass/Volume = 25g/5mL = 5 g per mL
Mass is measured by density multiplied by volume. In order to figure out a mass of a rock, one must know its density and its volume measurements.
density = mass/volume = 250g/45cm3 = 5.6g/cm3 (rounded to 2 sig figs)
Determine its volume by how much water it displaces, then divide mass by volume