Research on Density Essay

Determine the volume of the magnet and metal bolt to +/- 0.1 mL using units and sig figs carefully. Measure the mass and calculate the density of the magnet and metal bolt using the correct significant figures and units. Show work for full credit. (2 points)

2. If we used water displacement to find the volume of the gummy bear instead of the formula (l*w*h) the results would have been much more accurate. This is because the gummy bear is an irregular shaped object, meaning that it doesn't have a specific length, width, and height. Instead, with the formula, we have to measure the parts of the bear that we think will be the most accurate to the actual volume. With water displacement, there is no such problem. To find the volume with water displacement, you just subtract the original height the of water from the height of the water with the object submerged. There is no estimating with water displacement.

Purpose: Weighing objects. Figuring out the density with an object by calculated volume and Archimedes’ Principle.

5. Calculate the density of an object that has a mass of 43 g and a volume of 56.0 mL.

5. Calculate the mass of the water by subtracting “Mass A” from “Mass B.” Record the mass of the water in Data Table 4.

CHM130 Lab 6 Exploring Density Name A. Data Tables Place your completed Data Tables here Part IIIa (3 points) Volume of water in graduated cylinder (mL)10 mlMass of rubber stopper (g)11.15Volume of water and rubber stopper (mL)16.5 Part IIIb (6 points) Volume of water in graduated cylinder (mL)20Mass of iron nail (g)3.66Volume of water and iron nail (mL)20.5 Part IV (20 points) Type of Aluminum FoilMass (g)Length (cm)Width (cm)Volume (cm3)Thickness (cm)Regular.63g15 cm 10.02 cm.21 cm3.0014 cm Heavy Duty.97g15 cm10.01 cm .36 cm3.0024 cm B. Follow Up Questions Show all work for questions involving calculations. Part I Use the concepts/vocabulary of density to explain why the liquids formed layers in Part I of the procedure. (8 pts)

Introduction: Accuracy and precision were the major aspects of the lab. Accuracy is how close the average of the measured values are to the actual value. Precision is the closeness of repeated measurements. In the lab, the aim was to get as close as possible with both accuracy and precision when determining the mass and volume of the spheres. The mass was determined by weighing the spheres on the Analytical Scale and Triple Beam Balance Scale. The volume is determined by measuring with a ruler and by water displacement. The standard

3. The volume of a fixed mass of a liquid sample increases as the temperature rises from 20 to

D. A sample of gold (Au) has a mass of 26.15 g. Given that the theoretical density is 19.30 g/mL,

Place the object of your choosing on the triple beam balance's plate. 3. Use the weights to get the other side of the scale on zero to get the mass. 4. Next, place the object in a graduated cylinder filled with

Seven various household objects were chosen to measure using a digital gram scale. Each object’s mass was estimated by lab students and recorded in data table 4. A quarter, ball point pen, rubber bulb, large paper clip, green crayon, house key and a copper penny masses were estimated and recorded in data table 4. Each object was placed on the scale individually and its actual measurement was recorded in data table 4. As we started estimating the household objects we were often not correct in our estimations. As we measured more and more objects, we got better in our estimations by comparing objects with known masses and comparing them with the unknown

The density was found by dividing the mass of each object by the increase of volume of water. The average for the cube for method 2 was 7.6g/mL, the rectangular prism was 2.6g/mL, and the cylinder was 2.7g/mL. In order to reduce error, the process of each object was done three times. The graduated cylinder was also used as much as possible when collecting water because it can be accurately read to the nearest

Marble 5; 5.1g; total mass is 25.9g; total volume is 10.5mL, and volume of Marble 5 is 2 mL. Marble 6; 5.6g; total mass is 31.5g; total volume is 13mL, and volume of Marble 6 is 2.5mL. When analyzing the results it was discovered that as the number of marbles increase the total volume increased due to the increase of particles. The graph shows a straight line which also demonstrates how the ratio of mass and volume will not cause a change in the density no matter how much of the substance is being used. Possible errors that could have skewed the data include the water not being 30mL at first or a broken calculator. If the water was not originally 30 mL then the total volume of the marbles would be incorrect as the number wouldn’t be accurate because of uneven starting points. If the calculator used to find the answers is broken then the answers would all be inaccurate, which would mess up the data.

After that, it is crucial to convert the mass to volume. The water density at a temperature will aid this process. The compliance of the Volume Occupied by 1.000g of Water Weigh in Air table is deemed necessary throughout the comparison.

Furthermore, the measurements from a wooden block and a metal object were taken to calculate their volume and density. In this case, the calculations were more precise but due to other sources of errors, which may be systematic, random or personal, the data was not 100% accurate. There are always certain uncertainties associated with any type of measurement and it is important to know that no measurement will be one hundred percent correct.