DENSITY LAB: Practicing your Sig.Figs

Purpose: To calculate the density of several objects using measurement equipment (beam balances, electronic scales, rulers, graduated cylinders) and scientific methods ( direct and indirect methods: displacement, difference).

Experiment:

Show in detail the measurement of mass and volume for the following objects:

1.  Water

2.  Rock

3.  Wood Block

4.  Metal Cube

5.  Plastic Cube

6.  Rubber Stopper                        

7.  Paper  (note the number of pieces of paper has infinite sigfigs)

8.  Orange (vol sphere = 4/3 ∏ r³)

DATA

1.

                mass of grad cyl + water          132.675 g

                mass of grad cyl                        57.260 g

                mass of the water                       75.415 g     *

                Volume of H₂O………..(use a small grad cyl)    ____mL

                density = mass/vol      *respect/note sig figs!

                              =  75.415/?

2.