Question

a graduated cylinder begins with a volume of 30.0ml. If a rock is added to the graduated cylinder, the water level rises to 75ml. The mass of the rock is 55.0g. What is the density of the rock?​

Answer 1

Initial volume of graduated cylinder = 30.0 mL

Final volume of graduated cylinder after adding rock = 75.0 mL

Volume of the rock = Final volume of graduated cylinder after adding rock - Initial volume of graduated cylinder

= (75.0 - 30.0) mL

= 45.0 mL

Mass of the rock = 55.0 g

`\rm Density = (Mass)/(Volume) \\ \\ \rm = (55)/(45) \\ \\ \rm = 1.23 \: g/mL`

`\therefore` Density of the rock = 1.23 g/mL