BEAN BAG ISOTOPES:ABUNDANCE AND ATOMIC MASS LAB Prelab A new atomic theory‚ in which all atoms of the same element are identical to one another and equal in mass‚ was proposed by the scientist Dalton. Although the theory had its flaws and was simple‚ it was revolutionary. Scientists became able to study the actual structure and mass of atoms after the discovery of radioactivity. Soon‚ isotopes were discovered‚ as atoms of the same element which have been built up to have different masses. Purpose
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How effective were the Vietcong tactics of underground tunnels and booby traps in the Vietnam War? The Vietnam War was a war that started during the late 1950s and ended during the late 1970s. The Vietnam War ended in the Vietcong victory over America. I believe that this was due to the underground ‘labyrinth’ of tunnels and the vast usage of guerrilla warfare used by the Vietcong. Their usage of the tunnels and booby traps were in my opinion ingenious. The variety of the booby traps that were
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following from strongest oxidizing agent to weakest oxidizing agent: Ce4+ Ce3+ Fe2+ Fe3+ Mg2+ Mg Ni2+ Sn 17.3: Cell Potential and Equilibrium ∆G=-nFEº Example: Using the data in table 17.1‚ calculate ∆Gº for the reaction: Cu2+ (aq) + Fe(s) Cu(s) + Fe2+ (aq) 17.4: The Nernst Equation What happens when concentration and temperatures are not standard? Nernst Equation Sometimes written as: Assuming 25ºC Example 1: What is
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Test Dilute HCl Dilute NaOH Mg Silver N/A N/A Non soluble Bubbles Basic Hot/fizz N/A Cu Copper N/A Purple then turned black Non soluble N/A N/A N/A N/A Zn Silver N/A N/A Non Soluble N/A N/A Vaporized and fizzed N/A MgO White N/A Omits gas Hazy mix Boiled Rapidly Basic Got hot and fizzed Became thick or pasty CuCO3 Green N/A Turned black Hazy Green Became powdery Basic Dissolved and vaporized Turned blue and dissolved Cu(NO3)2 Blue N/A Turned green‚ became liquid Dissolved Boiled rapidly Acidic Turned
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water | .2 grams | Formula of anhydrous salt | Cu(SO4) – Copper Sulfate | Data Table Calculations 1. Mass of hydrate = 1.38 grams. Mass of anhydrous = 1.08 grams. Mass of water = .2 grams. 2. Ratio of anhydrous mass to hydrate mass is 5.4. 3. Moles of anhydrous salt: 1. 4. Moles of water are five moles. 5. Moles of water per mole of anhydrous salt was about 5.4/1 ratio but really is 5/1 6. Empirical formula for hydrate is Cu(SO4) * 5H2O Conclusion The mass of the anhydrous
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Multicomponent Phase Diagrams: Applications for Commercial Aluminium Alloys. Figure 1 Nikolay A. Belov‚ 2005. Multicomponent Phase Diagrams: Applications for Commercial Aluminium Alloys. The alloy is strengthened by the precipitation of hardening Mg and Cu rich phases‚ during ageing heat treatment. As a result the material can be up to 30% stronger‚ when the copper crystals are kept small forcing them to conform to the structure of the aluminium. Silicon is an influential element in the composition
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effect of concentration and temperature changes on equilibrium. 2. To predict the direction of the net reaction in an equilibrium system by Le Chatelier’s principle. Results: Part 1 (a): Effect of temperature changes on equilibrium Cu(NO3)2 (aq) Cu(NO3)2 (s) The color of the solution = dark blue with precipitate When placed in water bath 60oC When placed in ice bath The level of the solid Decreases Increases Color of the solution Dark blue with precipitate
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So‚ Pei and co-workers (Pei et al.‚ 2009) found that Cu increases CIP sorption on mineral components kaolinite and montmorillonite in a certain pH range‚ but Ross and Riley (Ross and Riley‚ 1992) showed that Cu increases the mobility and solubility of fluoroquinolones (Chen et al.‚ 2013). Although sediments 5 and 6 have the highest concentration of certain affordable microelements (Cu‚ Fe‚ Zn and Mn) show the lowest sorption potential to CIP‚ this contribution to sorption
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From the beginning of Beowulf we are able to understand and see the central themes and points that are being focused on. From the assigned readings of Beowulf and after finishing the entire piece I found it stuck with its major theme in which we are given from the prologue of the story. From the start of the story we are able to identify with Scyld Scefing and his role as king and leader. Power plays a major role and theme throughout the entire story which allows the story to flow well and keep the
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Elements of weather and climate[edit] There are several elements that make up the weather and climate of a place. The major of these elements are five: temperature‚ pressure‚ wind‚ humidity and rain. Analysis of these elements can provide the basis for forecasting weather. These same elements make also the basis of climatology study‚ of course‚ within a different time scale rather than it does in meteorology. Modifying factors of weather and climate[edit] The more important are also five: latitude
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