Density Measurement Lab

3. Analyze: What do you notice about the density of the Styrofoam pieces? The density remains the same.

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

Purpose: To become familiar with the International System of Units and common laboratory equipment and techniques. To learn how to determine volume, mass, length, and temperature of a wide variety of items. To learn how to calculate density and concentration of dilutions.

Every substance has its own unique density due to all of the atoms mass, size, and arrangement being different for each atom. Density is the relationship between two characteristics of matter which are mass and the occupied space. Density is a characteristic property, meaning the density of a substance will stay the same. In an investigation the objects densities would be calculated to determine whether the objects are made of the same material. The objects are all different colors, sizes, textures and shapes. In order to find density, the mass and volume would need to be calculated.

F. How did the magnet’s density measurement using the Archimedes’ Principle compare to the density measurement using the calculated volume? Which method might be more accurate? Why?

The purpose of this experiment is to learn how use a variety of tools that will aid in the gathering of data. This data is then used to calculate different measurements including, volume and density. The experiment will also further understanding of measurement errors using the data collected.

The objective of the density determination lab is to determine/compare the average density of pre-1982 and post-1982 pennies. This can be achieved by finding the mass to volume ratio then averaging the results. The purpose of this lab is to find out if the difference in composition of the pre and post pennies will affect their densities. Pennies made before 1982 where majority copper but pennies minted after 1982 are made with mostly zinc. With this background knowledge, we expect the outcome to be that the density of the pre-pennies will be greater than the post-pennies. This experiment will help us to determine if the pre pennies will have a higher density by finding the volumes and mass’s then comparing the results.

Pour 20ml water in a 50 ml graduated cylinder to measure the ball volume (a marble).

What is density? Density is the degree of compactness of a substance. The density formula is D=Mass divided by Volume. While doing this experiment you will need a graduated cylinder, electric balance and water displacement method to find the density of pennies after 1982. Water displacement is the volume in measure of the amount of space an object takes up. The differences between pennies before 1982 and after 1982 is after 1982 the government decided to put less copper because copper was way to expensive. Pennies before 1982 contained 95% copper, zinc 5% so then after 1982 they started using 95% zinc, and 5% copper. The objective of the lab was to find the density of a penny after 1982 to compare how big the difference was from before 1982

* Calculate the density of a small, irregular metal object using the water-displacement method. Record the results in a Data table 6.

The purpose of this density lab was to show the different ways density can be measured. Density is the measure of mass in matter. To find density, you would have to find the mass and the volume of the object. Then the mass would have to be divided by the volume to find the density. Density and specific gravity are similar because specific gravity is the density of a substance in comparison to the density of the standard. In this case, the standard is the density of water. The correct number of sig figs is necessary because it ensures that the calculations are consistent.

Measure 75 mL of a liquid/substance into a cup. Place liquid/substance on weighted scale to calculate the density. Record results on a piece of paper. When finished finding the density, pour the liquid/substance into beaker. Repeat steps 1-3 with 4 other

Mass density describes how heavy an object is. Defined by the Greek letter ρ, read as rho, density is a basic yet important physical property of matter. For a bulk body without accounting its existing pores and voids, density is represented by the ratio of its mass and volume. It is given by the equation

The method of finding the volume of a solid with a known cross section is, very straightforward. We will

This experiment was conducted to learn the relationship of 3 different types of pipettes and how to be accurate at measuring volumes of substances very accurately in quantitative analysis lab work. The accuracy of the measurement is the degree of closeness of measurements of a quantity’s actual volumes and the precision is the degree to which that are repeated measurements that are not changed show the same results.