into a more complex group over time‚ better survival % The Scientific Method Step 1- Observe and Formulate Questions Step 2- Reflect on the Implications Step 3- Propose a Hypothesis Step 4- Test the Hypothesis Step 5- Analyze the Results Step 6- Support‚ reject or modify the hypothesis How to write a hypothesis: "If _____[I do this] _____‚ then _____[this]_____ will happen." The dependent variable represents the response to the factor that changes. (The utensil used) The independent variable
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Ahmed Fun Filled Hands On Science 17 January 2013 Demonstrations in Chemistry Class Chemistry is a class that a lot of college student are afraid of‚ and when I think of chemistry‚ complex equations that don’t benefit come to my mind. The reason is that all I got out of chemistry is those unbeneficial equations‚ for me at least. Also‚ I learned that H2O is water. With all those negative statements‚ I still believe that chemistry is a very important subject to understand the magic of this life and
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Competition in school is harmful to the students. As unglamorous as it sounds‚ the purpose of a public education is to prepare the young person to enter the workplace as a fully functional worker. Competition encourages rugged individualists. The workplace needs team players who will cooperatively work together to meet common goals. The workplace does not need a group of stars who will not share the bonus and who work alone rather than working together. The more successful competitor‚ winner‚
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strong acids from weak acids? - Strong acids ionize 100% in dilute aqueous solution‚while on the other hand‚ weak acids ionize much less than 100%. b. Give two examples each of strong acids and weak acids. -Strong=HCl and HNO3 Weak =HF and H3PO4 6. H3PO4‚ which contains three hydrogen atoms per molecule‚ is a weak acid‚ whereas HCl‚ which contains only one hydrogen atom per molecule‚ is a strong acid.
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Mols = 0.025/ 24.31 = 0.001028 Also from the formula [Mg + 2HCl MgCl2 + H2] Number of moles of H2 is the same and Mg. Therefore‚ moles of H2 = 0.001028 Volume needs to be converted from cm³ to m³ (Final volume – Initial volume) * 10-6 e.g. 23.2 * 10-6 = 0.0000232 m³ Pressure needs to be converted from hPa to Pa hPa * 100
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Experiment 1: TLC Analysis of Analgesic Drugs 1/23/2011 Purpose: The goal of this experiment is to test our knowledge and understanding of TLC analysis by having us do a TLC analysis of analgesics to figure out their main chemical components. Calculations: 1.) Rf = Distance spot traveled/ distance solvent traveled Results: Table 1: TLC Analysis Analgesic Drugs | Rf Value | Acetaminophen | 0.323 | Aspirin | 0.597 | Caffeine | 0.081 | Unknown 154 (Plate 1) | 0.081‚ 0.306‚ 0.597
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unknown) examined and the color of the observed flame SOLUTION | NAME | COLOR | KNOWN 1 | BARIUM | GREEN | KNOWN 2 | CALCIUM | RED | KNOWN 3 | SODIUM | ORANGE | KNOWN 4 | RUBIDIUM | PURPLE | KNOWN 5 | POTASSIUM | BLUE | KNOWN 6 | LITHIUM | VIOLET | UNKNOWN 1 | SODIUM | ORANGE | UNKNOWN 2 | POTASSIUM | BLUE | 1. Identify each unknown from Part One of the lab and briefly explain why you identified each unknown as you did. Unknown 1 was Sodium‚ as it burned with the
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coefficient of benzoic acid is 3 in dicholormethane (methylene chloride) with respect to water. If 6 grams of benzoic acid is dissolved into 600 mL of water‚ how much benzoic acid will be extracted with four by 150 mL portions of dichloromethane (methylene chloride)? 4. In part D‚ you are to test the aqueous layer with litmus paper after removing the sodium bicarbonate layer. If the paper shows that the extracted layer is neutral‚ what assumption can you make about the contents of tube
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Abstract The separation of a Fe3+ and Ni2+ mixture was firstly investigated; followed by the determination of the Fe3+ and Ni2+ content (concentration) in the original mixture. It was found that iron was a yellow solution and nickel respectively had a greenish colour. Their original concentrations respectively were 0.03669 M for iron and 0.03159 M for nickel. Introduction Ion exchange materials are insoluble substances containing loosely held ions which are to be exchanged with other ions in
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Practice problems for CHE 101 final Approximate breakdown of points: Old Ch. 2: 10 Ch. 3: 15 Ch. 4: 15 Ch. 5: 15 Ch. 6: 15 Ch. 7: 15 Ch. 10: 15 New Ch. 8: 40 Ch. 9: 40 Ch. 11: 20 Final: May 3 at 11:45 am. Rooms posted on UBlearns Check your points entered on posted grade point totals. Keep all assignments. 1) For the following molecules‚ give the Lewis structures‚ the molecular geometry‚ hybridization‚ and whether the molecule is polar or nonpolar
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