A graduated cylinder contains 20.0 mL of water. An irregularly shaped object is placed in the cylinder, and the water level rises to the 31.2-mL mark. If the object has a mass of 80.4 g, what is its density?
A) 7.18 g/mL
B) 0.139 g/mL
C) 2.58 g/mL
D) 4.02 g/mL
E) none of these

Question

Quizplus · Accepted Answer

The density of an object is its mass divided by its volume. The volume of the object is the difference between the final and initial water levels in the graduated cylinder: 31.2 mL - 20.0 mL = 11.2 mL. The density of the object is therefore:density = mass / volumedensity = 80.4 g / 11.2 mLdensity = 7.18 g/mL

A Graduated Cylinder Contains 20