What is the density (g/ml) of an object that has a mass of 14.01 grams and when placed into a graduated cylinder, causes the water level to rise from 25.2 ml to 33.6 ml?

The displaced volume is the volume of the object (always, does not matter if it sinks or floats, the Eureka from Archimedes!)

Therefore: density = mass/volume = 14.01/(33.6-25.2)=14.01/8.4=1.6678 g/ml ~ 1.67 g/ml

The answer is c) pyrite