OBJECTIVE: The purpose of this experiment is to practice the addition of vectors graphically and analytically and to compare the results obtained by these two methods. APPARATUS: Cenco force table with pulleys. Metal ring‚ strings‚ weight hangers and weights. Rulers and protractors. The force table provides a means for applying known forces at one or more points and in various directions in the horizontal place. The forces are the tensions in strings which pass over pulleys attaches to the
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Oxalic Acid Lab Aim: Use acid base titration to determine the number of water molecules in hydrated hydrochloric acid. Apparatus required: Oxalic acid solution 250 cm3 Weighing bottle Digital balance Beaker (250 cm3) Distilled Water Volumetric Flask 250cm3 Filter funnel Pipette Burette 50cm3 Retort Stand Beakers 100cm3 Standardized sodium hydroxide solution 0.1M Pipette filter Conical flasks 250cm3 Phenolphthalein Indicator Procedure 1) Rinse the burette with distilled
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Tran Thi Quynh My quynhmy2202@gmail.com 0126 447 9977 Tk 21/47 Nguyen Canh Chan‚ Cau Kho Ward ‚ District 1‚ HCMC Personal information Full name: Tran Thi Quynh My Date of birth: 22 February 1989 Place of birth: Gialai province Marital status: single Personal profile: Enthusiastic‚ open minded‚ willing to learn‚ can- do spirit‚ responsible. I have just graduated from International University and I had a chance to open my mind and experience the life in America within 4 months. I’m enthusiastic
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EXPERIMENT 2 ACID DISSOCIATION CONSTANT OF AN INDICATOR DYE OBJECTIVES Using spectrophotometric method: determine the wavelengths at which the acid and base forms of the dye in aqueous medium exhibit maximum absorption; determine the molar absorptivities of the acid and base forms of the dye and estimate an unknown concentration of the dye in solution using the Beer-Lambert’s Law; and determine the acid dissociation constant of the indicator dye. THEORY The absorption or reflection of
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recommended in 2003 that consumption of trans fats be limited to less than 1% of overall energy intake. WHO also recommended that the Governments around the world should try to gradually phase out PHVO or trans fat. The US National Academy of Sciences (NAS) recommends that trans fatty acids are not essential and provide no known benefit to human health‚ whether of animal or plant origin.Secondly‚ while both saturated and trans fats increase levels of LDL‚ trans fats also lower levels of HDL‚ thus
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Herlina Pryor EXP 105 – Final Reflection Assignment Learning to me is allowing your brain to receive information and then applying in to your life experiences. I feel like face to face learning is better‚ however‚ online is more convenient. I prefer face to face because it offers a more personal relationship with your classmates and your professor. Although it is not practical for my life‚ I do wish I could attend classes in a regular environment. Online provides me that much needed space and opportunity
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How Acetylsalicylic Acid was Discovered Acetylsalicylic Acid in its earliest form was a powder for the bark and leaves of the willow tree. Hippocrates‚ who lived sometime between 460 B.C. and 377 B.C‚ founded it. This “Miracle Drug” that was able to relieve pains was later looked into with further detail by Johann Buchner. He isolated a tiny amount of bitter tasting yellow‚ need- like crystals‚ and called salicin. By 1829 French Chemist Henri Leroux had improved the extraction procedure to
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Trans-Atlantic Slave Trade (Essay) The Trans-Atlantic slave trade had a massive impact the British‚ West Indies‚ Africa‚ and the emerging African American culture. The British were impacted with massive profits‚ to the disadvantage of many parts of Africa‚ where large amounts of men and women from all around the continent were forced into slavery. The West Indies were impacted by being turned into sugar plantations‚ and an African American Culture was born from all the African slaves that were
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Jarrett Sears Dr. Hummel Chem 121 2/7/13 A Chemical Reaction between Tin and Nitric Acid Introduction: Finding the products made from the components of tin metal and nitric acid is the ultimate objective of this lab; the formula of the products will be found in the CRC handbook thereafter. Procedure: First‚ obtain a clean crucible‚ and heat it under a Bunsen burner until it is as hot as possible‚ about 15 minutes within a fume hood unit. The Bunsen burner will be used under the fume
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Lab Report for Experiment #10 Stoichiometry of a Precipitation Reaction Student’s Name ____________________ Date of Experiment ___________ Date Report Submitted _________________ Title: Purpose: Instructor Changes: Weigh out about 1.7 g of CaCl2·2H2O and record your mass to +/- 0.1 g (for example 1.6 g‚ 1.7 g‚ or 1.8 g). We have made this change so that you will have 2 sig figs in subsequent calculations. Have you made any changes to the procedure? Please explain: Data Tables and Observation:
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