Why was it created? Use your textbook and Internet research to support your answer. TCP/IP stands for Transmission Control Program(Protocol is the earlier version) and Internet Protocol. These two were created basically at the same time by 2 Darpa Scientists without one it would be hard to nearly impossible to have the other. This system was created because it was a way that any network could communicate with another through a gateway.
First off is to test the student’s knowledge on using measurement tools accurately when measuring the mass and volume of the metals in this specific lab. It is important to precisely measure these values, because it will result in a more accurate density if the mass and volume were to be measured accurately. Lastly, the student will be able to use the density they obtained and compare it to the theoretical value to conclude if they were able to use the measurement tools correctly and find the mass and volume, which resulted in the density. By comparing the answer the student obtained to the theoretical value the student can figure out what errors they made and what to improve on in their future labs. Density is a very important factor in industrial use such as building ships whether navel or cruise ships.
Ch 10. Rep from MEASUREMENTS * to last 11 dc. Skip next 10 dc. 1 dc in last Approx 15" x 8" [38 x 20.5 cm]. dc.
Ocean County College Department of Chemistry LAB 1: OBSERVATIONS OF CHEMICAL CHANGES Submitted by Date Submitted: 05 FEB 2010 Date Performed: 30 JAN 2010 Lab Section: DL2 Course Instructor: Professor Maria Tamburro Purpose : Using various chemicals provided in the LABPAQ and home cleaning supplies I am to study the composition and structure of materials, and the changes that they undergo. Throughout this experiment, indication that chemical changes are taking place is to be noted. A chemical change occurs when the chemical makeup of the substance changes, and a new substance or substances are formed. The most common chemical changes are observable through color changes, the formation of
Woods Chem-140 Lab-8 Visible Spectroscopy with CoCl2 - 1 - Purpose: In this experiment you will learn to use visible spectroscopy to determine the concentration (molarity) of a solution, and use MS Excel to analyze your experimental data. You will also gain additional experience in preparing solutions and using molarity. Prelab: wavelengths around that point at 10 nm intervals until you get a maximum. (There is no need to try to get closer than 10 nm). 0.9 0.8 0.7 Absorbance 0.6 0.5 0.4 0.3 0.2 0.1 0 400 450 500 550 600 650 700 750 λ max 500 nm 550 nm • • Make sure you understand the directions for using the spectrophotometer and have them written in your manual.
Techniques to be practiced are: analytical balance, weighing by difference, volumetric glassware and significant figures. Procedure Part I * Form a group of 2-3 students * Obtain sodium carbonate in smallest beaker Part II * Add 10 mL of water to a beaker * Add small amount of sodium carbonate with spatula * Swirl solution to see if it dissolves * Add one drop of indicator and record the color of solution Part III * Complete 4 trials of various volumes of each of the three acid solutions. * Record the mass of sodium carbonated needed to react with the volume of each type of acid in a chart * Add one drop of indicator to each volume of acid before putting sodium carbonate into solution to observe reaction Part IV * Create tables containing the four solution volumes and mass of sodium carbonate required per volume * For each solution: * Find ratio of mass to volume for each trial * Compute average value of the ratio * Create a graph for each acid demonstrating mass per volume of acid solution. Draw best fit line through points and find the slope of that line * Also create one graph for each concentration of acid that displays the moles of acid in relation to the moles of
Design Your Own Physical and Chemical Change Lab Report Emma Melina March 11th, 2011 Purpose: To determine whether the following combinations of chemicals produce chemical or physical reactions. Hypothesis: If the following combinations of chemicals are mixed together, then they will produce mostly chemical changes. Materials: -2 metal 1g spoons -calcium chloride (CaCl) -baking soda (NaHCO3) -phenolphthalein -bromothymol blue -plastic bags -distilled water -graduated cylinder Procedure: 1. Add combinations from the observation table into baggies and mix together. 2.Record observations.
If your guess was correct about the number of folds. Be careful to obey all the school rules for your science fair report. One or two paragraphs for each grade level will do if you weren't given how long it should be. Be detailed as well. But make it neat.
[pic] VCE Chemistry Study Design – Units 1 and 2 Sample Assessment Tasks 2007–2014 Introduction This support material has been developed to assist teachers in the implementation of Units 1 and 2 of the VCE Chemistry Study Design accredited for the period 2007–2014. It is to be used in conjunction with the study design. The material provides examples of the extended experimental investigation, the response to stimulus material in written, oral, visual, or multimedia format and the summary report including annotations of three practical activities. The following examples have been prepared by teachers of VCE Chemistry. The examples are illustrative and offer one approach to assessment tasks for VCE Chemistry
• #1 Observation of Chemical Changes • Maurice Smith • September 5, 2012 2:33pm • Location • CHEM 1211-06 • In this lab project we are expected to examine the chemical changes of some of the most basic chemicals. We are expected to take the different chemicals and match them together against two paper backgrounds (white, black) to observe the chemical changes. We will also test starch amounts with household foods and observe the chemical changes. In addition to the foods, we are to take some household chemicals (which will be listed) and test them with some of the samples that we have in the Observation of Chemical Changes lab kit. Data Table 1: Reactions Expected |Well #/Question |Chemicals