Water has a density of 1.0 g/mL. Which of these objects will float in water? Object I: mass = 50.0 g; volume = 69.4 mL
Object II: mass = 60.9 g; volume = 54.7 mL
Object III: mass = 100.0 g; volume = 40.0 mL
A) I only
B) I, III
C) II only
D) II, III
E) III only

Question

Quizplus · Accepted Answer

To float in water, an object must have a density less than 1.0 g/mL, which means it must weigh less than an equal volume of water. Object I has a density of 0.72 g/mL (50.0 g ÷ 69.4 mL), which is less than 1.0 g/mL and therefore it will float. Object II has a density of 1.11 g/mL (60.9 g ÷ 54.7 mL), which is greater than 1.0 g/mL and therefore it will sink. Object III has a density of 2.5 g/mL (100.0 g ÷ 40.0 mL), which is much greater than 1.0 g/mL and therefore it will sink.

Water Has a Density of 1