I find that using the water displacement method is easier for me and I think it’s more preferable as well. By using the ruler to find the volume takes too much effort, because it involves too many miniscule numbers to factor

316- Scoblete Chemistry 2 of 4

in, and multiplying decimals is just a bother if you have

them. By using the water displacement method, you just record the original volume of the water without the object, and then subtract that from the volume of the water with the object inside. For finding the mass of the object, I find that utilizing the electronic balance is more preferable. By using the electronic balance, your data can be more accurate than the data you obtain from the triple-beam balance. I think that using ten pennies would be more preferable to use than just one penny. By using ten pennies you not only find the mass and the volume, but also the mass and volume of just one penny. All you would have to do is divide all the data for ten pennies by ten and you would get the data for one penny. You can improve this experiment by unifying the type of ruler used in the lab. What I mean is that instead of getting different rulers manufactured by different companies you can get rulers made by the same company so you know that all rulers are made the same.

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Data Collection and Processing

Calculation 1- Calculation of one of the Pre and Post 1982 pennies volume, since they both had the same measurements. (Hereafter referred to as pp)

Volpp=π*r2*h

Volpp=3.14*(1)2*0.2

Volpp=6.28→ 6.28x10-1

Calculation 2- Calculation of the density for ten of the Post 1982 pennies using the electronic balance and water displacement data. (Hereafter known as post)

Denstiypost=Total Mass/ Volume

Densitypost=25.1/4

Densitypost=6.275→ 6.275x100

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