Balancing chemical equations 1. Complete the following sentences‚ using the words or groups of words in the box below. You may use some words more than once. |• as small as possible |• decrease |• molecules |• quantities | |• balance |• different |• nature |• rearranging | |• bonds |• equal
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.... (b) water from aqueous magnesium sulfate .................. (c) glycine from a mixture of the amino acids‚ glycine and lysine ................... (d) iron filings from a mixture of iron filings and water .................. (e) zinc sulfate crystals from aqueous zinc sulfate .................. (f) hexane from a mixture of the liquids‚ hexane and octane .................. [1] [1] [1] [1] [1] [1] [Total: 6] 2 Selenium and sulfur are in Group VI. They have similar properties. (a) One of the main uses
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Name: Soo Jin Park Date: 03/30/2015 Exp 4: Properties of Gases Lab Section: 73426 Data Tables: Hydrogen Step B: Describe the zinc and acid reaction. As placing a small piece of Zn(mossy zinc) metal into the test tube containing the diluted HCI(Hydrochloric Acid) solution‚ gas bubbles rose from the solution slowly at the beginning and vigorously in process of time. As this reaction continued for a long time‚ transparent solution turned into white opaque color and black precipitates were formed
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Impacts of the Battery The creation of the battery was invented in 1859 by a man named Gaston Plante. Over the years as technology advances so do they batteries adding different materials like nickel‚ zinc‚ lead‚ graphite‚ carbon and toxic acids such as acid‚ magnesium dioxide‚ and hydrochloric acid making it one of the most helpful inventions known to mankind. Throughout our everyday lives a lot of things we use require a battery. The disposable battery converts chemical energy into electrical
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EXPERIMENT-1 CHEMICAL REACTIONS AIM: To perform and observe the following reactions and classify them into: (i) Combination reaction (action of water on quick lime) (ii) Decomposition reaction (action of heat on ferrous sulphate crystals) (iii) Displacement reaction (iron nails kept in copper sulphate solution) (vi)Double decomposition reaction (reaction between sodium sulphate and barium chloride) APPARATUS REQUIRED: 1. A rack of at least six clean test tubes and a boiling
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Chemistry 11 Final Examination Review - Answers Part A - True or False. Indicate whether each of the following statements is true or false. Correct the false statements. F 1. The mass of an electron is equal to the mass of a proton. The mass of an electron is less than the mass of a proton. T 2. The mass of a proton is approximately equal to the mass of a neutron. T 3. The atomic number represents the number of protons in a nucleus. T 4. The proton has a mass of approximately
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In 1790 he was studying the mineral witherite (BaC03) and when he mixed it in with hydrochloric acid (HC1) he was surprised at the result he got. Shocked at the result he assumed that an unknown mineral has contaminated his sample of witherite. He named the unknown mineral strontianite (SrCO3). Later in 1798 it was separated into its pure
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Exam Review What influences what we eat? 1. Media‚ Family/Social‚ Food Availability- (Commercials will convince you to eat something as when celebrities eat something you will want to as well‚ If you’re at a party or if you see your friends eating something you will want to as well‚ Import/Export for certain countries‚ the weather and how much you have to spend on food.) 2. Emotional/Psychological‚ Cultural and Family/Social. Kitchen Safety 1. Keep kitchen neat and organized‚ Close
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tables of AlkaSeltzer‚ 4mL Bromothymol blue .04%‚ 20 mL hydrochloric acid‚ 4-6 pieces of manganese metal‚ 4-6 pieces of mossy zinc‚ and 3 pipet bulbs. Gather the following items: Matches‚ toothpicks‚ pie tin‚ white vinegar‚ 3% hydrogen peroxide‚ measuring spoons‚ drinking straw‚ tissue paper‚ and baking soda. Read all instructions carefully before beginning your experiment. 1. Hydrogen a. Take a small piece of Mossy Zinc from the experiment bag and place it into a test tube containing
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which are 1083⁰C and 2595⁰C. The density of metal is 8.96 g·cm−3. Besides‚ copper is stable to corrosion and fully recyclable. Recycling occurs without losing of qualities. At room temperature the state of copper is solid and usually it is softer than zinc. Also‚ copper owns a considerable number of qualities which make it exclusive. The main of them is ductility of element. It can mix with metals such as gold‚ silver and lead. In spite of this‚ copper has a great ability to conduct electricity and heat
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