Prelab Chemistry Lab

2. Collect data: Click Slice. Choose a piece of Styrofoam and drag it onto the Material Investigation tray. Record the mass and volume, then calculate the density by dividing the mass by the volume. Replace the piece, and then repeat for the remaining pieces.

The calculated volume used the length x the width x the height to get its volume. I feel the measurement method would be more accurate as it is using exact measurements. Archimedes Principal could possibly be flawed if not done exactly right.

I will be doing this experiment to understand density of water compared to the volume of an object. D=m/v=mass/volume

14. Calculate the volume of the magnet by multiplying the length × width × height, record in Data Table 5.

Weight 10 dry Post-82 pennies which get 24.91g, using 30ml initial volume measuring the volume of 10 pennies, record the data 3.2ml. Using equation Density= Mass/Volume, get the density of the post-82 pennies is 7.78g/ml. Then calculate the error%=0.04%, and the deviation%=1.60%.

heavy duty samples as well as your dimensional measurements (length and width in cm) from Part III of this experiment, calculate the height, or thickness, of each sample of aluminum using the formula V l x w x h. In the formula, V stands for volume, l for length, w for width, and h for height. Once again, you will have to use your algebraic skills to manipulate the formula, to solve for height. You must show all your work. (15 pts)

Next, the data was recorded and was used in the formula to find the density of the 40 pennies.

• Calculate the volume by multiplying the length, width, and thickness. Round to the nearest hundredth.

2. In order to calculate the density of a solid or liquid sample, what measurements are needed?

In Measuring and Understanding Density, several experiments were performed to find density of regularly shaped objects, irregularly shaped objects, liquids and gasses. An additional experiment was done to find the specific gravity of a sampling of liquids. The purpose of the experiment was to provide a better understanding of density and to be able to extrapolate unknowns based upon these calculations. The experiments yielded data in keeping with Kinetic-molecular theory in regards to the density of water versus its temperature. Key measurements and formulae were also used to determine densities of metal and plastic objects as well as irregularly shaped rocks. It is possible to find the density of an object (be it liquid, gas or

2. Fill a flask with pure water (0% sugar), another with 0.2M water, another flask with 0.4 M water, and another flask with 0.8M water.

XII. Take the 250 ml beaker to your lab bench. Set up a gravity filtration with a plastic funnel, folded wet filter paper, and an Erlenmeyer flask. Pour the content in the 250 ml beaker slowly through the filter paper. Wash the filter paper with deionized water. Dispose of the filtrate in the proper labeled waste container.

This purpose of this experiment is to calculate the thickness of a sheet of aluminum foil. This experiment is necessary because the human eye cannot accurately measure the small thickness of aluminum foil with only a ruler. However, to understand the procedure one needs to understand conversion, density, and volume. Conversion is when one converts one unit to another unit using a conversion factor(e.g. 2.54cm/in). Density is how much mass there is in a certain volume(density=mass/volume) and it stays constant in a substances and mixtures that have the same composition. Volume is the amount of space that an object occupies. The experiment will consist of weighing of aluminum foil, measuring the length and width, then converting these values

Lab - Determining the Thickness of Aluminum Foil By: Ishaan Sharma Problem: How can you determine the thickness of a piece of aluminum foil, in centimetres? Variables: Independent Variable – Size. We were able to change the size of the foil and it could not change by any other variable.

In order to obtain the true volume of volumetric glassware holds, this formula will be used.