Question

A rock weighing 30.0 g is placed in a graduated cylinder displacing the volume from 22.3 mL to 27.6mL. What is density of the rock in grams/cubic centimeter?

Answer 1

`rho=5.66g"/"cm^3`

Explanation:

Since the water level rose from `22.3`mL to `27.6`mL, then that must mean that, the `30g` of rock is equal to `27.6-22.3=5.3mL`.

We know that a rock cannot be `5.3mL` because that doesn't make any sense!

But, we can convert `5.3mL` to `cm^3`. Know that, `1mL=1cm^3`.

So, the rock is `5.3cm^3` in volume.

The formula for density is `rho=m/V`, where `m` is the mass of th e object in kg, g, etc., and `V` is the volume in `cm^3`, `m^3`, etc.

So, the density of the rock is `rho="30g"/"5.3cm"^3~~5.66g"/"cm^3`