energy. E) The total energy of a system does not remain constant. 6) 7) A covalent bond is best described as A) the sharing of electrons between atoms. B) the transfer of electrons. C) a bond between two polyatomic ions. D) a bond between a metal and a polyatomic ion. E) a bond between a metal and a nonmetal. 7) 8) What answer should be reported‚ with the correct number of significant figures‚ for the following calculation? (249.362 + 41) / 63.498
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| | |2 |9/2 Lec |Ch. 2 Atoms‚ Molecules‚ & Ions | |HM1 | | |9/2 Lab |Exp. 2 Paper Chromatography |Exp. 1 Advanced study assignment (ASA1) |Quiz 1‚ ASA2 | | |9/4 Lec |Ch. 2 Atoms‚ Molecules‚ & Ions |Homework 2 (HM2) |
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charcoal is too large to pass any of the membranes. 3. Pressure changed the speed of filtration but pressure does not affect the size of the solutes nor the pore size of the membrane. Activity 5 1. The SP pump ejects 3 sodium ions per every 2 potassium ions coming in. 9:6 represents the ration of the SP pump 2. Predicted that no sodium would be transported because the coupled
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became clear after 3 drops of HCl C. Cobalt (III) chloride equilibrium Color before: fruit punch red Color after: plum red/ condensation was blue Color upon cooling: fruit punch red V. Postlab Questions 1. Fe in the presence of hydroxide ions forms an insoluble gelatinous precipitate. Did
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Ionic Reactions Results B - Do your results agree with your expectations from the solubility rules/table? Our results seemed to largely agree with the established solubility rules/table; however‚ a few reactions with the commonality of being mixed with Co(NO3)2 (cobalt nitrate) [reference Row A‚ Columns 2‚ 3‚ and 4] seemed to have such a pale pink tone that it was difficult to decide whether that could have been a precipitate or the lighting in the area where the experiment took place. Ultimately
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Reactivity of Halide Ions Purpose: There are four halide salts used in this experiment that are found in the human body. Sodium fluoride is poisonous‚ but has been traced to be beneficial to humans in the prevention of tooth decay. Sodium chloride is added to many of our foods to increase flavor. Sodium chloride is important for many life processes‚ but too much intake is linked to high blood pressure. Sodium bromide is distributed throughout body tissues. Sodium iodine controls cell growth. The
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Experiments ( 6th edition pp. 531-534) Belmont‚ CA: Brooks Cole. Purpose: In this experiment‚ potassium carbonate combined with a quaternary ammonium salt to form a strong base. The strong base created an anion from an ester of malonic acid. The ion reacted with bromobutane which was also in the reaction solution to give the product. The yield product was a butyl derivative of malonic ester that was isolated by adding water to the reaction solution‚ and extracting with ether. The ether was dried
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Part 1 of 1 - 100.0/ 100.0 Points Question 1 of 25 4.0/ 4.0 Points Enter the answer to 2 Across chemical Answer Key: Chemical Question 2 of 25 4.0/ 4.0 Points Enter the answer to 6 Across lateral Answer Key: Lateral Question 3 of 25 4.0/ 4.0 Points Enter the answer to 7 Across cellular Answer Key: Cellular Question 4 of 25 4.0/ 4.0 Points Enter the answer to 10 Across dehydration Answer Key: Dehydration Question 5 of 25 4.0/ 4.0 Points Enter the answer to 12
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Effects of oligomycin‚ ouabain‚ p-Aminohippurate‚ sodium concentrations and potassium concentrations on active transport of the Malpighian tubules of Acheta domesticus Key Words: Malpighian tubules‚ Acheta domesticus‚ PAH‚ ouabain‚ oligomycin‚ Na+‚ K+ Silvia Kilic 100488712 BIOL 3040U CRN: 70041 Thursday‚ March 5th‚ 2015. Results The Malpighian tubules were incubated in the solutions for 15 minutes before being observed. The transport of CPR into the lumen was highest when there was no addition
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Methods for Determining Soil Cation Exchange Capacity Donald S. Ross and Quirine Ketterings The cation exchange capacity (CEC) of a soil is a measure of the quantity of negatively charged sites on soil surfaces that can retain positively charged ions (cations) such as calcium (Ca2+)‚ magnesium (Mg2+)‚ and potassium (K+)‚ by electrostatic forces. Cations retained electrostatically are easily exchangeable with cations in the soil solution so a soil with a higher CEC has a greater capacity to maintain
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