Question

7. The mass of a rock is 20 g. The rock is dropped into the beaker and the volume cha
from 20 ml to 24 ml. What is the volume of the rock?​

Answer 1

Answer:

Every time a problem asks you to find the density of a substance, your goal will essentially be to determine the mass of one unit of volume of said substance.

That is exactly what density tells you -- the mass associated with one unit of volume of a given substance.

In your case, the volume of the sample is expressed in milliliters, so one unit of volume will be

1 mL

.

Now, your rock has a volume of

30 mL

and a mass of

20 g

. The important thing to remember about density is that it is independent of the size of the sample!