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Subject:
Life Sciences
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Essay
Language:
English (U.S.)
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Topic:

Volume, Mass, and Density Calculations

Essay Instructions:

Part 1: Unknown Metal

1) Carry a balance to your work station.  Always carry the balance by Its base, never by the balance arm

2)  Use  our balance to determine the mass of your metal sample.  Remember the balanceIs always read to the hundredth of a gram (two decimal places)

3) Select a graduated cylinder wide enough so your metal sample could fit easily into the opening. then add water to fill about halfway. Carefully record the volume of the water you added

4) Tilt the cylinder and place your metal sample gently such that it slides into the water

5)  Measure the volume occupied by the water and metal together. Use this to calculate the volume of the metal.

6)  Calculate the density of your metal. Show your work!

7)  Use the following table of densities. What metal do you think your sample is made of, and why?

 

Aluminum         2.70 g/ml

Titanium           4.51 g/ml

Tin                  7.26 g/ml

Iron                 7.87 g/ml

Nickel             8.90 g/ml

Copper            8.96 g/ml

Lead                11.3 9/ml

Gold                19.3 g/ml

Essay Sample Content Preview:
Part 1
1 No answer needed.
2 Mass of metal sample = 74.71 g
3 Volume of water added = 49.98 mL
4 No answer needed.
5 Volume of water + metal = 57.80 mL
6 Volume of Metal=57.80 mL-49.98 mL=7.82 mL
Density of the Metal= mass of metalvolume of metal=74.71 g7.82 mL=9.55 g/mL
7 Based on the table of densities and upon comparison of the calculated density of the metal, the most likely composition of the sample is Copper since its density has the closest value to the sample’s density.
Part 2
1 Mass of a single penny = 2.31 g
Mass of three pennies = 7.35 g
Based on the weighed masses, the pennies have different masses.
2 No answer needed.
3 Mass of one stack = 24.41 g
4 Mass after adding a second stack = 50.56 g
Mass after adding a third stack = 75.57 g
Mass after adding a fourth stack = 100.76 g
5 Water added = 30.10 mL
Number of Pennies

Mass (g)

Volume (mL)

Density (g/mL)

1

2.31

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