circumstances. 2. Know how to “correctly” measure volume and mass (weight). 3. Become familiar with significant figures and its relationship to measurements and data recording (significant figures). 4. Become familiar with the errors‚ precision and accuracy associated the various measurement tools and techniques. 5. Determine the density of liquids and solids. 6. Determine the best-fit straight line as a method to examine linear relationships and to use this relationship as a predicative model
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’Stock Records Accuracy’ means: (1) a correspondence between what is present on the computer file and what physically exists‚ in reality‚ (2) that activities which have been recorded as taking place against stock are truly what in fact occurred‚ and (3) that no activity which took place is unrecorded in the system. As we shall see‚ the central stock file is a most important element of any system within the company. The records within the file are ’keyed’ on each product’s unique item code**. That
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Pipetting‚ weighing‚ accuracy and plotting Introduction In this practical‚ there were three parts in which basic skills and key ideas were put into practice as they are essential to working in the laboratory in order to get reliable and valid results; one of the basic skills put into practice was pipetting. This was the main objective for the whole practical‚ as pipettors are the fundamental tools used to measure liquids in laboratories. Not only did this develop the skills and confidence acquired
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01.07 Accuracy and Precision: Balance Lab Worksheet Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. 1. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) Trial 1 36 - 25.5 = 10.5 Trial 2 36.5 - 25.5 = 11 Trial 3 36.9 - 25.5 = 11.4 2. Calculate the
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Experiment 1 (week 2) The purpose of this experiment is to become familiar with the precision and accuracy of scientific glassware. I figured the smaller the glassware the more accurate the measurements would be. Which when we were preforming the experiment proved my theory. As the glassware got smaller the easier it was to get the accurate amount of water into the glassware. We went from a big flask to a small beaker to an even smaller pipette. We used a scale to get the appropriate weight
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01.07 Accuracy and Precision: Balance Lab Worksheet Before You Begin: You may either copy and paste this document into a word processing program of your choice or print this page. Procedure Access the virtual lab and complete the experiments. Data Below is the table that you will complete for the virtual lab. Either type your results into this table or print the table from the virtual lab (it must be submitted to receive full credit for this assignment.) To print from the virtual
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Student: Keila Dukuze Date: Feb/10/2013 Lab# 3 Section: 110 Pre-Lab Report Determining the Density of Various Liquids and Solids The purpose of this experiment is to determine the weight (density) of certain liquids and solids in chemistry. These liquids include; Water‚ Hexane‚ Carbon Tetrachloride‚ and solids include; Copper‚ Zinc‚ Lead and‚ Aluminum. It’s important to know the weight of these products so you can properly conduct experiments and make clear observations. Different
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Lesson 2 Lab: Weighing on an Analytical Balance & Distillation PART 1 Begin by viewing the following Thinkwell video 15.1.8 CIA Demonstration: Weighing on an Analytical Balance After you watch the above video‚ answer the questions below in sufficient detail: (a) (2 pts) What are the features of an electronic balance? Include all of those discussed in the video. Answer: There were two features of an electronic balance discussed in this video. First there is the electronic read out which makes
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Math Practice Lab Pre-Lab Questions: 1. The rules concerning handling significant figures are as follows: When dividing/multiplying The answer has no more significant digits than the number with the fewest significant digits (the least precise figure). Round off after calculations have been performed. When adding/subtracting Answer has no more places than the addend‚ minuend‚ or subtrahend with the fewest number of decimal places. Significant figures are irrelevant when adding/subtracting
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Lab 6 Experiment 2 1. It is important that bass caught and marked are returned to the lake unharmed because if they are harmed them they are less likely to be caught again or they may end up dying if they are returned harmed. 2. I don’t this type of population would be easier to count directly because I don’t think it would be possible to catch all of the bass in the population to conduct this experiment. 3. I think that sample size is relative to population density and will positively
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