Analysis Of Density Lab Report

The students constructed two data tables, one for each set pennies. The students recorded the number of pennies, the

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

In this lab experiment our main focus was to get skillful in using tools such as the metric ruler, balances, thermometer, and graduated cylinder to capture measurements of length, mass, temperature and volume. Additionally, this lab helped us to become more familiar with the uncertainty of measurements, as well as becoming efficient with rounding our measurements to the correct numbers of significant figures. Our results are measured consistently with rounding to the closest answer we could possibly acquire as the data can tell you.

The purpose of this lab was to identify unknown bacteria cultures using various differential tests, and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways, each was used in a way to help recognize those specifics and identify the unknown cultures. The differential tests used to identify the unknown cultures were Gram stain, Catalase, Mannitol Salt Agar (MSA), Blood Agar, Novobiocin, Coagulase, and DNAse (Alachi, 2007).

In the fourth stage of this experiment, the density of a gas was determined. A 250ml flask was weighed with an empty rubber balloon and the mass was recorded.

1. Objective: My objective for this experiment is to find the mass, volume, and density of a variety of objects. After this, I will record my data and place a select few of the items on a graph. My hypothesis for this experiment is, "If I measure the mass of every object, the wooden ball will have the least because it seems to be the smallest and most lightweight. " 2.

Corresponding to the previous experiment, this week’s experiment measures the participants’ ability to conduct basic, fundamental laboratory procedures. These procedures revolve around scientific measurements of volume, mass, and density. Unlike last week’s activity, this week’s experiment had a few modifications. In addition to distilled water, saltwater and an unknown substance were added. There was a total of five substances to choose from; Hexane, Methanol, Ethyl acetate, Ethylene glycol, and Dichloromethane. Part C, the unknown liquid number was four, which the average density was 0.789 gmL-1, and from looking at the chart the unknown identity was methanol. Part A, the temperature of the water was 20 oC, which was in front of the class,

In this lab, the calculations were based upon mass, volume and their relationship to density. However, a couple of errors made our results have variations. First of all, the graduated cyinder in which the table salt plus water was added was a little wet. So the extra drops of water contributed to the whole mass of the table making out results a little different from the known results. Also, in the “Measuring the density of bearing balls” lab, the diameter of the balls was difficult to measure because of the shape. The balls were spheres and

The experimental error in this lab included the question whether the digital scale was as precise as it could be, how the cooling time affected the water in the hydrates, and any miscalculations that could have occurred. The digital scale could have been more precise since they are more precise scales that could deliver more accurate masses in this lab.

In the Gummy Bear Lab, the scientific method is used throughout the process. The first step of scientific method is observation, in this case I observed how a gummy bear’s density will be affected. Second step, was to state a hypothesis on how the water will affect the density of the gummy bear overnight. In addition, my hypothesis stated, “ If the gummy bear absorbs the water overnight then the density will increase.” Next step was to gather materials to prepare to perform an experiment in the laboratory. The materials used were the following: a ruler with centimeters, balance scale, graduated cylinder, gummy bear, and a small cup of water. Then by using the materials, measurements of the gummy bear were recorded such as the length, width,

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.

First, all of the equipment was obtained and placed on the table. The necessary equipment was weighed using a top loader balance, which used grams as its unit of measurement. The test tube, which held the samples, was filled with water from a plastic squirt bottle. A piece of filter paper, which had been folded several times, was placed over a funnel over an Erlenmeyer flask to filter the mixture in the test tube. The test tube mixture was poured onto the filter paper.

The mean voltage of the battery terminals while connected to the identification resistors is presented in Figure ‎4 12. These samples have been pulled out from the voltage sensor of the PEB panel. The voltage decreased as expected from 12.53 to 12.5 during first 20 seconds of connection to the

The purpose of this experiment is to conduct what happens to gummy bears when we put them into different liquids. When we were done we gathered data and saw that the gummy bears ended up with different textures and sizes. There were only some minor differences. For water after a day, the length changed, the width, height, and mass. For salt water only the mass changed, before it was 2.6 and after it was 1.5 grams. The next liquid is sugar water, and for that liquid all the of the data changed. The length was 3 cm before, after it was 3.5 cm. The width of the gummy bear was 3 cm before, after it was 1 cm, and after it was 1.5 The height was 2 cm, and changed to 1 cm. Lastly is the mass, it was 2.6 and the after it changed to 5.1. The

The purpose of this experiment is to determine the molar mass of an unknown volatile organic liquid, using methods such as, the Dumas method, and then state its identity.