What is the density of the rock in gramscubic centimeters if a rock weighing 32.0 g is placed in a graduated cylinder displacing the volume from 12.3 ml to 16.8 ml?

To find the density of the rock, first calculate the volume it displaced: 16.8 ml - 12.3 ml = 4.5 ml. The density can then be calculated using the formula density = mass/volume. Thus, density = 32.0 g / 4.5 ml = 7.11 g/cm³. Therefore, the density of the rock is approximately 7.11 grams per cubic centimeter.