Finding the formula of magnesium oxide Aims When magnesium is heated in air‚ it reacts with oxygen. During this oxidation reaction‚ magnesium oxide is produced. This increases the mass. If we know the mass of magnesium at the start‚ and the mass of magnesium oxide produced at the end‚ we can work out the mass of oxygen which has been combined with the magnesium. We can use these masses to work out the formula of magnesium oxide. Eye protection must be worn Apparatus Crucible and lid
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Julia Supangan blk. 2-4 The Reaction of Various Metals with Ionic Salts Purpose: To examine the reaction of various metals with ionic salts Materials: * 4 test tubes * test tube racks * 10mL measuring cylinder * 4 metals (in containers)- Zn‚ Sn‚ Mg‚ Fe * copper (II) sulphate solution Safety: 1. Be careful with copper (II) sulphate solution it is poisonous and corrosive. handle with care 2. Do NOT BREATH in any gases produced 3. If you touch any of the
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Discussion Questions for the Aluminum Case Group: 1. Conduct a S-C-P analysis for the Aluminum industry. Is primary aluminum production industry an attractive(profitable) industry? Why and why not. 2. Using information in the case and the data from the attached spreadsheet‚ construct the industry supply curve for primary aluminum. Please note the marginal costs are used to derive the supply curve and be careful as to what cost items can be counted as “marginal” costs. DO NOT use regressions
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1. In general‚ why have many different alloys been developed and used? Many different alloys have been developed and used due to the various properties they have when alloyed which increase their amount of uses. Properties such as increased tensile strength‚ the variation in melting point‚ malleability and luster are all properties that come as a result from alloyed metals. For example‚ carbon and manganese form an alloy called carbon steel‚ which is very hard and can therefore be used to make things
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17. In a sample of solid Al(NO3)3‚ the ratio of aluminum ions to nitrate ions is (1) 1:1 (2) 1:2 (3) 1:3 (4) 1:6 19. What is the total number of atoms in (NH4)2SO4? (1) 10 (2) 11 (3) 14 (4) 15 22. Write the correct formula for the following binary ionic compounds. (a) Lithium fluoride LiF (b) Calcium oxide CaO (c) Aluminum nitride AlN (d) Beryllium chloride BeCl2 (e) Potassium iodide KI (f) Aluminum oxide Al2O3 23. Write the correct formula for the following binary molecular
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Everyone is familiar with the three ’R’s - Reduce‚ Reuse and Recycle. But does every citizen follow it religiously? The relationship between environmentally aware citizens and a balanced ecosystem is direct. With the rising concern about global warming and climate change‚ recycling has gained a lot of importance. Here are some advantages of recycling different types of material. Plastic » According to the Stanford University PSSI Recycling Center‚ if you recycle 1 ton of plastic‚ it saves
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Key Questions 8.1 and 8.2: Writing and Balancing Chemical Equations Include phases of matter for ALL reactants and products. Circle the chemical formula of the precipitate‚ if any‚ in each reaction. Balance all chemical equations. 1. Write a chemical equation for the reaction that occurs when solid sodium oxide is added to water at room temperature to yield sodium hydroxide . (Check the Solubility Rules to determine the phase of matter of sodium hydroxide.)
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Financial Blog Corliss Group Lenders Fear Spread of Chinese Commodities Fraud Case Large banks and trading firms are frantically trying to determine whether they have fallen victim to a suspected commodities fraud emanating from the giant Qingdao Port in northeast China. Citigroup and several other large Western banks are concerned that their loans may lack the appropriate collateral‚ big stockpiles of copper and aluminum at the port. The banks have inspectors on the ground who are trying
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CBSE TEST PAPER-01 CLASS - IX Science (Atoms and Molecules) 1. Atomic radius is measured in nanometers and (a) 1nm = 10-10m (b) 1m = 10-10nm (c) 1m = 10-9nm (d) 1nm = 10-9m 2. Symbol of Iron is :- (a) Ir (b) I 3. Atomicity of chlorine and Argon is (c) Fe [1] (d) None of these [1] [1] (a) Diatomic and Monoatomic (b) Monoatomic and Diatomic (c) Monoatomic and Monoatomic (d) Diatomic and Diatomic 4. Molecular mass of water ( H 2O ) is (a) 18g 5. State law of conservation of Mass
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POT TENDING MACHINE PTM is the crucial equipment of large anode pre-baking workshop. It is used in the environment of high temperature‚ large current‚ strong magnetic field and HF gas. It can perform the following procedures ANODE CHANGE: Anode in the pots is changed at an interval of every 27 days since daily 1.5 cm of the anode gets consumed. A carbon block is usually 55 cm high of which only 40 cm can be used up. The main reason behind the anode consumption is the following electrolytic
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