The main idea that we have been working on in chemistry this week is density. We have learned that density is the amount of particles packed into a space. The density of an item, or element, does not change no matter the size of the item or element. The formula for density is density=mass/volume. First we explored graphing mass,volume and density. If mass, in grams, is on the x-axis and volume, in cm3, on the y-axis, the density is slope of the line. So for example, if the mass of something is 14, and the volume is 7, then the density is 2. And to graph it, the slope would be 2.
The next thing that we did while looking at density was the Density of a Gas lab. In this lab, we filled a trough with water, put a jar filled with water over the hole in the bottom of the trough. Then we filled a flask with water, wrapped an alka-seltzer tablet in aluminum foil and put that in the flask, then we attached the trough and flask. What happened, is the water in the jar, which was in the trough, decreased. To be honest, I don't know why this happened because I really don't understand this lab. I know this happened because of the gas from the water and the alka-seltzer tablet. Our data was 127.2g was the mass of everything before we did the lab, and 126.7g was the masss of everything after the lab.
After the Density of a Gas lab, we did a Thickness of Aluminum Foil lab. What we did in this lab, is we had 2 pieces of aluminum foil, one regular and one heavy duty. We were also given the density of aluminum. We found out the masses of both foils, put it in the equation, density=mass/volume, and figured out the volume. To figure out the thickness, we can insert the volume into the equation volume=length x width x height. The thickness in this case is height. So then we measured the length and width and put all of that into the equation to figure out the height.
The main idea that we have been working on in chemistry this week is density. We have learned that density is the amount of particles packed into a space. The density of an item, or element, does not change no matter the size of the item or element. The formula for density is density=mass/volume. First we explored graphing mass,volume and density. If mass, in grams, is on the x-axis and volume, in cm3, on the y-axis, the density is slope of the line. So for example, if the mass of something is 14, and the volume is 7, then the density is 2. And to graph it, the slope would be 2.
After the Density of a Gas lab, we did a Thickness of Aluminum Foil lab. What we did in this lab, is we had 2 pieces of aluminum foil, one regular and one heavy duty. We were also given the density of aluminum. We found out the masses of both foils, put it in the equation, density=mass/volume, and figured out the volume. To figure out the thickness, we can insert the volume into the equation volume=length x width x height. The thickness in this case is height. So then we measured the length and width and put all of that into the equation to figure out the height.
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