is very fast! (Instead‚ your teacher may tell you to run cold water over the outside of the test tube. Be sure to use a test tube holder to hold the test tube since the reaction gives off considerable heat.) The products forming in this step are hydrogen gas‚ H2(g)‚ aluminum chloride solution‚ AlCl3(aq)‚ and metallic copper‚ Cu(s). When the reaction is finished‚ remove and discard the liquid. Wash the solid with half a pipet of distilled water. Discard the liquid. Wash the solid again with half
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products. This process is summarized by a chemical equation. In the Balancing Chemical Equations Gizmo™‚ look at the floating molecules below the initial reaction: H2 + O2 H2O. 1. How many atoms are in a hydrogen molecule (H2)? 2 2. How many atoms are in an oxygen molecule (O2)? 2 3. How many hydrogen and oxygen atoms are in a water molecule (H2O)? 2 H‚ 1 O 4. In general‚ what does a subscript (such as the “2” in H2) tell you about the molecule? The subscript tells you how many atoms of each element
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Oxidation occurs by: -The loss of electrons -The gaining of oxygen‚ -The loss of hydrogen -An increase in the oxidation state Reduction occurs by: -The gaining of electrons -The loss of oxygen -The gaining of hydrogen -A decrease in the oxidation state Objective: To find the redox reactions between a metal and dilute acid
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metal strip was placed in the lead(II) nitrate‚ magnesium sulfate and dilute(3M) sulfuric acid. Overall‚ putting these different strips of metal into different solutions will help determine the reactivity of copper‚ lead‚ zinc‚ magnesium‚ silver and hydrogen.
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it is an odourless‚ colourless gas that is a large percentage of ‘natural gas’ and is a large contributor to global warming as it is a greenhouse gas and is flammable so is used as a fuel. Methane is a product of the covalent bonding of carbon and hydrogen. Products of the combustion of methane include carbon dioxide‚ water‚ soot and carbon monoxide. Soot and carbon monoxide are produced during the incomplete combustion of methane. Methane is combusted to generate energy in power plants‚ the formula
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stereochemistry controlled by intramolecular interactions instead of steric factors. Despite isatin’s lack of steric requirements around its carbonyl functionality‚ its hydrazone derivatives exist only as Z-isomers because of the formation of an intramolecular hydrogen bond between de (–NH–) group of the acyclic chain and the oxygen of the isatin’s (–NHCO–)
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beam by the pole. T = 392 N‚ H = 339 N‚ V = 0 6. A water molecule consists of an oxygen atom with two hydrogen atoms bound to it as shown in Figure 5. The bonds are 0.100 nm in length‚ and the angle between the two bonds is 106°. Use the coordinate axes shown‚ and determine the location of the center of gravity of the molecule. Take the mass of an oxygen atom to be 16 times the mass of a hydrogen atom. x = 6.69 x 10-3 mm‚ y = 0 7. A constant torque
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® keep it simple science Copying is permitted according to the Site Licence Conditions only Preliminary Physics Topic 4 THE COSMIC ENGINE What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. THE HISTORY OF OUR UNDERSTANDING OF THE UNIVERSE 2. HOW THE UNIVERSE BEGAN (THE "BIG BANG" THEORY) 3. LIFE-CYCLES OF THE STARS 4. ENERGY FROM THE SUN‚ & ITS EFFECTS ON US but first‚ let’s revise... The Structure of the Universe The EARTH
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reduce vanillin to vanillyl alcohol. This lab report recaps the procedure and results of the lab. The chemical process studied in this lab was reduction‚ the process of reducing the number of bonds to oxygen and increasing the number of bonds to hydrogen. Other chemical processes included in the lab were recrystallization‚ melting point‚ and extraction. Procedure: Preparation of Vanillyl Alcohol 2.5 mmol of vanillin were dissolved in 2.5 mL of 1 M NaOH solution in a 25 mL Erlenmeyer flask.
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years ago‚ its surface was molten. As it cooled‚ volcanoes were formed. These volcanoes released various gases. Around 4600 million years ago the Earth’s atmosphere was made up of Carbon Dioxide‚ Water Vapour‚ Nitrogen‚ Ammonia‚ Hydrogen Chloride‚ Sulphur Dioxide‚ Hydrogen and the Noble gasses. There was no oxygen at this time. Oxygen only appeared in the atmosphere around 3500 million years ago when the first simple organisms began releasing it. Most of the Earth’s atmosphere (78.08%) now is made
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