Question

A graduated cylinder has a mass of 80 g when empty. When 20 mL of water is added, the graduated cylinder has a mass of 100 g. If a stone is added to the graduated cylinder, the water level rises to 45 mL and the total mass is now 156 g. What is the density of the stone?

Answer 1

Answer:

Mass of the rock

100 - 80 = 20g (water mass)

100 + 20 = 120g (total mass)

156 - 120 = 36g (rock mass)

Volume of the rock

V of water after adding rock - v of water before adding the rock

45 - 20 = 25 m^3 (volume of rock)

Density of the rock

Density = Mass/Volume

Density = 36/25

Density = 1.44 g/m^3

Answer 2

Answer:156g-100 = 56g

45-20= 25mL

56g divide 25mL

=2.24

Explanation: