Density Of Rock Lab

4. Predict: What do you think is the density of the whole block of Styrofoam? 0.2 g/cm3

because each of the objects displaced the water by 1 mL, their mass over that mL is their density.

Density is the amount of matter per unit of measurement (Merriam-Webster. Merriam-Webster, n.d. Web. 26 Aug. 2016.). If water has a density of 1.0 g/mL and you place a substance with a density of 1.8 g/mL the substance will sink because it is denser than water. Density is often measured in g/cm^3 or g/mL because the formula for density is D=m/v.

In our experiment we used the determined mass and volume of the sample to calculate the density of an irregular solid and of an unknown liquid. We then compared our density of our liquid with densities of known substances to determine the identity of the unknown substance. The purpose of the experiment was to determine the density of a solid and an unknown liquid. Furthermore, we also evaluated the relationships of density, mass, and volume.

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.

13. Use the ruler to measure the length, width, and height of the magnet in centimeters. Record the measurements in Data Table 5.

Weight one piece of Zn, got 4.64g. Using 20ml initial volume measuring the volume of Zn, record data 0.7ml. Using equation Density=Mass/Volume, get the density of 100%Zn is 6.63g/ml.

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. Find a mineral in the list with the same density and hardness as your sample.

The group then measured the mass of the 20 pre-1982 pennies on a digital scale and recorded the data. We then did the same with the 20 post-1982 pennies.

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

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

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

By finding the volume, the thickness of a piece of aluminum foil can be found. Part C of the lab will require to find the mass and volume of cylinders of unknown material. The dimensions were measured with a ruler to determine volumes, and the mass was found using an electronic balance. These values were then plotted on a mass versus volume graph to calculate the density, which would be the slope of the scatterplot. Once the density is found, then the unknown material can be identified.