GCSE CHEMISTRY High Demand Questions THE PERIODIC TABLE QUESTIONSHEET 1 The boxes represent particles of different gases. One box shows the particles of elements in group 0 (group 8). A (a) (i) B C D What name is given to group 0 (8) elements? (ii) Name two elements from group 0. ......................................................................................................................................................................... [2] (b) (i) Which box
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Check out this science tutorial to learn how to make a bar of soap out of guava leaf extract‚ which was made by Dragonknight15 and fellow peers for their 3rd year chemistry class. This guava-infused soap actually helps clear up acne. You’ll need sodium hydroxide‚ guava leaves‚ containers‚ and lavender scent.In our personal experience‚ the hardest part about a science investigatory project is simply coming up with a good idea. And we suggest that for your investigatory project you find a topic
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Sodium was first discovered by Sir Humphrey Davy in 1807. This element is the 11th element found on the periodic table; located in group 1 and period 3. Its chemical symbol is Na and it is classified as a metal. Metals‚ by definition‚ means that they are elements that are luster‚ lose electrons very easily‚ malleable‚ ductile‚ and are great conductors of heat and electricity. Sodium is found in group 1 of the periodic table because the electronegativity of sodium is very low. This allows it to form
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through the filter. The purpose of this experiment is to determine the yield of copper (II) sulphate reaction. Reagent preparation: 0.5 mol/L = mol/0.1L 0.5 (0.1L)=mol mol = 0.05 0.05 x 40 (molar mass)= 2 There are 2 grams of solid sodium hydroxide. Method: Weigh 100 mL beaker Transfer anhydrous copper (II) sulphate to that beaker Heat beaker at level 6 for 3 minutes‚ stirring occasionally Removing beaker from balance and weigh after cooling for 3 minutes Turn off
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In this lab experiment‚ we used sodium bicarbonate to influence photosynthesis. Sodium bicarbonate is a formula of NaHCO3 (baking soda). In this lab experiment‚ we observed photosynthesis in spinach leave and investigated the effect of sodium bicarbonate on photosynthesis. The experiment was to determine how many disks of spinach leaves float at the end of every ten minutes. Our main focused and question was how using different amount of concentration of sodium bicarbonate would affect the process
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Abstract The preparation of 7.7-dichlorobicyclo [4.1.0]heptane which is also known as 7‚7-dichloronorcarane was done by reacting cyclohexene ‚ chloroform and a base( 50% aqueous sodium hydroxide) with benzyl triethylammonium chloride. The latter being a water soluble phase transfer catalyst (PTC).reaction was performed at room temperature and was distilled at atmospheric pressure. The mechanism of action of the above mentioned PTC is described in the text along with the mechanism for the addition
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Pettit Abstract: A solution of cyclohexene‚ aqueous sodium hydroxide‚ and benzyltriethylammonium was used to synthesize 7‚7 – dichloronorcarane by the following reaction: + CHCl3 + OH - H2O + + Cl - After completion of the experiment‚ the percent recovery was calculated to be 46.21% Introduction The purpose of this experiment was to form 7‚7-dichloronorcarane by means of carbene trapping. Cyclohexene‚ aqueous sodium hydroxide‚ and benzyltriethylammonium chloride were used
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hydrochloric acid to some of the substances bubbling‚ and smoking Give at least two examples of chemical changes you observed. Green changed from blue to application of HCL to Mg smoking and bubbling and CuCO3 Classify the following properties of sodium metal as physical or chemical: • Silver metallic color: Physical • Turns gray in air: Chemical • Melts at 98oC: Physical •
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(1 mole) I want 20 g of C4H9Br so; ( 20 x 74 ) / 95.9 = 15.5 g ‚ so : Production of 1-Bromobutane will require 15.5 g of Butan-1-ol to obtain the full amount at 70% yield. Chemicals Needed: * Butan-1-ol‚ 7.72 g. (C4H9OH) * Sodium Bromide (powdered). (NaBr) * Concentrated
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China Enoxaparin Sodium Market‚ 2009-2018″ by China Research and Intelligence is now available at chinamarketresearchreports.com. Contact sales@chinamarketresearchreports.com with Research Report on Investigation Report on China Enoxaparin Sodium Market‚ 2009-2018 in subject line and your contact details to purchase this report or get your questions answered. The collection of ‘Life Sciences’ market research reports has a new addition of “Investigation Report on China Enoxaparin Sodium Market‚ 2009-2018”On
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