In this experiment, you'll use the virtual lab to calculate the density of 3 metalsLinks to an external site. found as elements in the periodic table. Density is calculated by the equation: density = mass / volume. So for each of the 3 metals, you'll need to determine the mass and the volume of each. The unit of mass will be in grams and the volume in cubic cm (= cm³) which = 1mL.

Since this is an introductory course in chemistry, I've designed the experiment for you, so use the following steps to help you determine the density of each metal.

1. From the Stockroom, obtain the following:

From Tools, get a scale

From Glassware (in the stockroom), get 3 250mL beakers

and From Solutions, get all 3 of the metals.

2. Right click on the 1st beaker, and select rename. Rename it to Metal #1. Then rename the 2nd and 3rd beakers as Metal #2 and Metal #3.

3. On a piece of paper that you will record and show your work on, make a data table with 4 columns and 4 rows. Label your data table as Table 1. Virtual Density Lab Data Table. ( In chemistry we always give tables titles.) See the sample data table below for details.

Hint: Use a graduated cylinder to help you accurately determine the volumes like in the video I included in this module since all of your volumes shouldn't always = 10mL.

Table 1. Virtual Density Lab Data Table

	mass in grams of empty beaker	mass in grams of beaker + metal	mass of sample in grams [= (mass of beaker + metal) - mass of empty beaker].	volume in cubic centimeters (cm3)	density in g/cm3	Identity of the Metal based on density.
Metal #1
Metal #2
Metal #3

4. Drag the beaker labeled Metal #1 onto the scale until you see the dashed/dotted line appear around the scale. You should see the display on the scale change from 0 about 100 g.

5. Drag the bottle with Metal #1 over the beaker labeled Metal #1 until a dashed/dotted line appears around the beaker. Then pour 6.0000g of Metal #1 into into the beaker. If the volume to the left of the screen is still showing 0, then add another 6.0000g until the volume no longer is 0mL. (You may need to repeat this step a couple times). Record the final mass as well as the volume of the metal. Note that 1.0000mL = 1.0000cm³.

6. Repeats Steps 4 and 5 for the other 2 metals.

7. Using the formula density = mass / volume, calculate the density for each of the 3 metals (show your work in your own handwriting on the paper with your hand-written data table).

8. Compare your densities with those provided in the lab (silver has a density of 10.5g/cm3, rhodium 12.4cm3, and platinum21.45g/cm3) and identify each of the metals based on which density is closest to your calculated values.

9. Enter your answers in the answer boxes below your lab bench and click the green Check box.

10. Take a screenshot of where it says "Experimental part: DONE" and "You have correctly identified the unknown metals: ..... Well done! You did a good job!"

11. Upload the screenshot here along with a picture of your data table and work.

Note: if you did not identify all 3 metals correctly, you may repeat the lab until you correctly identify all 3. For grading details, please refer to the rubric for this assignment.