Answer to Question #71397 in General Chemistry for ciera dennis

Question

In order to find out the density of a small rock, Eddie dropped the rock into a graduated cylinder filled with 52.5 mL of water. The level of the water went up to 68.1 mL. Eddie then placed the rock on a triple beam balance, and its mass was 27.69 g.

Answer 1

V(rock) = 68.1 mL – 52.5 mL = 15.6 mL = 15.6 cm3
d is density:
d= (m(rock))/(V(rock))= (27.69 g)/(15.6 cm^3 )=1.78 g/cm^3
Answer: the density of the rock is 1.78 g/cm3.