A graduated cylinder has a mass of 50 g when empty. When 30 mL of water is added, the graduated cylinder has a mass of 120 g. If

Question

3 years ago

9

a rock is added to the graduated cylinder, the water level rises to 75 mL and the total mass is now 250 g. What is the density of the rock?

1 answer:

Verdich [7] · Answer 1 · 2022-06-07T18:39:24+03:00

Answer:

2.9g/cm^3

Explanation:

We're given that the mass of the system before the rock was added was

120g . The mass after the rock was added was 250g, so the rock's mass is 130g.

The initial volume of water in the graduated cylinder was

30 mL , and the volume after the rock was added read 75mL , so the rock's volume is 45mL

Density = Mass over Volume.

AKA. 130g/45mL

2.9g/cm^3 (rounded)