469 prompts matching "Drawing dot-and-cross diagrams for simple molecules"
Project task: Researching the Ajaokuta and Delta steel plants
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Chemistry at work: The Nigerian iron and steel industry
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Exam practice: The amphoteric nature of aluminium oxide and hydroxide
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Chemistry at work: Aluminium smelting and the power it demands
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Explain back: The trend in reactivity and in oxidising power
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Chemistry at work: The hazards of the halogens and their safe handling
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Explain back: Sulphur trioxide and the contact process
I have just studied sulphur trioxide and the contact process in my SS3 Chemistry class. Le
Exam practice: Sulphuric acid as an acid, a dehydrating agent and an oxidiser
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Chemistry at work: Sulphur dioxide and acid rain in Nigeria
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Explain back: Ammonia, its preparation and its properties
I have just studied ammonia, its preparation and its properties in my SS3 Chemistry class.
Exam practice: Nitric acid, its manufacture and its reactions
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Calculation practice: Calculating the mass of ammonia from nitrogen and hydrogen
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Explain back: The preparation and properties of carbon dioxide
I have just studied the preparation and properties of carbon dioxide in my SS3 Chemistry c
Chemistry at work: Carbon dioxide in the Nigerian bottling and fire-safety trades
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Explain back: Permanent hardness and the compounds responsible
I have just studied permanent hardness and the compounds responsible in my SS3 Chemistry c
Exam practice: Removing permanent hardness by chemical and ion-exchange methods
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Chemistry at work: Hardness and the Nigerian water supply industry
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Exam practice: The NPK rating and how to read it
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Project task: Comparing the fertiliser brands on sale locally
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Chemistry at work: Fertiliser production and distribution in Nigeria
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