I Term Exam Chemistry Project Sunday‚ January 13‚ 2013 Grade/Section: Date: Question I: State whether each statement is true or false‚ then correct each incorrect statement. (7pts‚ 1 point each) 1- An Element is a substance that can be broken down into simpler substance by chemical means. 2- The Aufbau Principle states that energy levels must be filled from the highest to the lowest‚ when writing the election configuration. 3- Atomic radius decreases across a period
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Name Naza Moore ID# 24120389 Lab# 2 Lab instructors Alecia Palmer and Donald Burke Course Instructor Maureen Wilson Lab Title Preparation of cyclohexene from cyclohexanol Aim Preparation of an Alkene by dehydration of an alcohol in the presence of a catalyst. Calculate the percentage recovery of products. Test for purity and identification of products. Abstract Cyclohexene and cyclohexanol are both colourless aromatic compounds. The major difference between the two is the presence
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Anthony Martinez Mr. Hruby Chemistry R Period 4(5A) Name & Symbol: Platinum (Pt) Properties: -Atomic Number: 78 -Atomic Mass: 195.084 amu -Appearance: Shiny‚ smooth surface‚ silver like‚ solid. Melting point (K): 2045 Boiling point (K): 4100 Valence electrons: (+1)‚ +2‚ (+3)‚ +4‚ +6 Atomic radius (pm): 139 1st Ionization energy (kJ/mol): 868.1 Electronegativity: 2.28 Natural Occurring Isotopes: Six stable isotopes of platinum occur in nature (190‚ 192‚ 194
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Soluble | Phosphate PO 3-4Carbonate CO 2-3Sulfite‚ SO 2-3 | H | Soluble | Once you recorded all of the data‚ there were a few questions that needed to be answered. A. Compare your results with the solubility rules and/or solubility table in your chemistry text. I would say that my results turned out pretty close to the rules in the text book. I observed many different reactions occurring. The colors of the solutions changed from clear to purple‚ from clear to blue and yellow‚ and from clear to a milky
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Standardize a solution of potassium manganate(VII) by an iron (II) salt (ammonium iron (II) sulphate) Introduction Oxidation numbers describe the number of electrons the atom will gain or lose during a reaction. Each atom in an equation can be assigned an oxidation number according to certain rules. If the oxidation number of an atom increases as you go from the left side to the right side if an equation‚ oxidation has occurred (electrons have been lost); if the oxidation number decreases
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Solutions Solutions are a combination of solvents and solutes. When a solute dissolves into a solvent‚ the combined product of the two reactants is called a solution. The definition of a solute is the reactant that’s being dissolved. The only difference from a solute and a solvent is that the solvent is the one that’s doing the dissolving. Molecules randomly flow in all directions until there is an equal concentration throughout the solution. The dissolving process can vary depending
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isolate components into pure samples. Real world uses of this technique includes identifying certain biomolecules by pigmenting certain regions of the sample‚ is used in forensic sciences t analyze DNA and RNA sequencing‚ and is used in organic chemistry to identify unknown compounds. http://www.tutorvista.com/biology/uses-of-paper-chromatography Purpose: The purpose of this experiment is to compare the separation abilities of salt water and isopropyl alcohol using paper and candy pigments. Materials:
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Molly Hubner Period 1 Extra Credit Paper Chemistry of Cancer Cancerous cells develop when conditions for cells are favorable‚ therefore following the divisions to continually occur‚ never stopping. When this happens‚ a tissue mass of cells called a tumor is formed and does not respond to normal controls regarding cell growth. Cancer cells have the following characteristics: profound changes in the plasma and membrane cytoplasm
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May 07‚ 2013 International Islamic University Islamabad female campus holds Annual Prize Distribution Ceremony Faculty of Management sciences clinched team winner title‚ while Faiza Rehman Student of BS stood best athlete of 2013 annual sports gala of IIUI Islamabad ( ) International Islamic University‚ Islamabad (IIUI) organized Prize Distribution Ceremony of Annual Sports 2013 at Female Campus of the university. Prof. Dr. Ahmad Yousif Al-Draiweesh‚ President IIUI as chief guest presided
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References: Gilbert‚ John C. and Martin‚ Stephen F. Experimental Organic Chemistry: A Miniscale and Microscale Approach. Thomson Brooks/Cole‚ Pacific Grove‚ CA‚ 2006‚ 4th Edition.
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