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11 Iron for welding railway lines together is produced from the reaction of Po with aluminium. How much iron oxide will react with 1.00 kg of aluminium? Give your answer to 3 significant figures. Fe₂O3 + 2AI →→2Fe + Al2O3

11 Iron for welding railway lines together is produced from the reaction of Po with aluminium. How much iron oxide will react with 1.00 kg of aluminium? Give your answer to 3 significant figures. Fe₂O3 + 2AI →→2Fe + Al2O3

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter2: Chemical Compounds
Section: Chapter Questions
Problem 97QRT: Chalky, white crystals in mineral collections are often labeled borax, which has the molecular...
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Telative formula mass (M₁) of the following substances. a) oxygen, O₂ c) magnesium sulfate, MgSO, b) propane, C₂Hs d) calcium nitrate, Ca(NO₂)₂ 2 Sodium reacts with oxygen to make sodium oxide as shown in this equation 4Na + O₂ → 2Na₂O a) Show that the sum of the relative formula masses of all the reactants equals the sum of all the relative formula masses of the products. b) In a reaction, 11.5g of sodium reacts with 4.0g of oxygen. What mass of sodium oxide is formed? 3 When calcium carbonate is heated it decomposes. In a reaction 10g of calcium carbonate was heated. At the end of the reaction, only 5.6g of solid was left. What has happened to the other 4.4g? 4 In a reaction to make iron metal, it was expected that 200g of iron would be formed. However, only 180g was produced. a) Calculate the percentage yield for this reaction. b) Give three possible reasons why the percentage yield was less than 100%. 5 a) Calculate the atom economy to make iron by heating iron oxide with carbon in the following reaction. Give your answer to 3 significant figures. Fe₂O3 + 3C 2Fe + 3CO b) Calculate the atom economy to make ammonia by reacting hydrogen with nitrogen in the following reaction. 3H₂ + N₂ → 2NH3 c) Calculate the atom economy to make hydrogen by reacting of methane with steam in the following reaction. Give your answer to 3 significant figures. CH, + H2O → 3H2 + CO 6 What is the mass of one mole of the following substances? a) potassium, K b) nitrogen, N₂ c) sucrose, C₁2H22011 7 What is the mass of each of the following? b) 0.05 moles of methanol, CH3OH a) 2.8 moles of chlorine, Cl₂ 8 How many moles are there in each of the following? b) 10 kg of iron oxide, Fe₂O3 a) 2.4g of oxygen, O₂ d) 25 mg of platinum, Pt c) 0.5 tonnes of ammonium nitrate, NH4NO3 9 a) What mass of water molecules is the same number of molecules as the number of molecules in 88g of carbon dioxide molecules? b) What mass of oxygen molecules is the same number of molecules as the number of atoms in 10 g of calcium atoms? 10 Hydrogen can be made by the reaction of methane with steam. What mass of hydrogen is formed from 80g of methane? CH, + H,O → 3H2 + CO 11 Iron for welding railway lines together is produced from the reaction of iron oxide with aluminium. How much iron oxide will react with 1.00 kg of aluminium? Give your answer to 3 significant figures. Fe₂O3 + 2AI →→2Fe + Al₂O3 91
Transcribed Image Text:Telative formula mass (M₁) of the following substances. a) oxygen, O₂ c) magnesium sulfate, MgSO, b) propane, C₂Hs d) calcium nitrate, Ca(NO₂)₂ 2 Sodium reacts with oxygen to make sodium oxide as shown in this equation 4Na + O₂ → 2Na₂O a) Show that the sum of the relative formula masses of all the reactants equals the sum of all the relative formula masses of the products. b) In a reaction, 11.5g of sodium reacts with 4.0g of oxygen. What mass of sodium oxide is formed? 3 When calcium carbonate is heated it decomposes. In a reaction 10g of calcium carbonate was heated. At the end of the reaction, only 5.6g of solid was left. What has happened to the other 4.4g? 4 In a reaction to make iron metal, it was expected that 200g of iron would be formed. However, only 180g was produced. a) Calculate the percentage yield for this reaction. b) Give three possible reasons why the percentage yield was less than 100%. 5 a) Calculate the atom economy to make iron by heating iron oxide with carbon in the following reaction. Give your answer to 3 significant figures. Fe₂O3 + 3C 2Fe + 3CO b) Calculate the atom economy to make ammonia by reacting hydrogen with nitrogen in the following reaction. 3H₂ + N₂ → 2NH3 c) Calculate the atom economy to make hydrogen by reacting of methane with steam in the following reaction. Give your answer to 3 significant figures. CH, + H2O → 3H2 + CO 6 What is the mass of one mole of the following substances? a) potassium, K b) nitrogen, N₂ c) sucrose, C₁2H22011 7 What is the mass of each of the following? b) 0.05 moles of methanol, CH3OH a) 2.8 moles of chlorine, Cl₂ 8 How many moles are there in each of the following? b) 10 kg of iron oxide, Fe₂O3 a) 2.4g of oxygen, O₂ d) 25 mg of platinum, Pt c) 0.5 tonnes of ammonium nitrate, NH4NO3 9 a) What mass of water molecules is the same number of molecules as the number of molecules in 88g of carbon dioxide molecules? b) What mass of oxygen molecules is the same number of molecules as the number of atoms in 10 g of calcium atoms? 10 Hydrogen can be made by the reaction of methane with steam. What mass of hydrogen is formed from 80g of methane? CH, + H,O → 3H2 + CO 11 Iron for welding railway lines together is produced from the reaction of iron oxide with aluminium. How much iron oxide will react with 1.00 kg of aluminium? Give your answer to 3 significant figures. Fe₂O3 + 2AI →→2Fe + Al₂O3 91
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