500 prompts matching "Exam practice: Fertilisers and their effect on crop yield"
Calculation practice: Calculating the mass of iron from a mass of haematite
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Chemistry at work: The Nigerian iron and steel industry
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Calculation practice: Calculating the electricity needed to extract aluminium
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Calculation practice: Calculating the volume of chlorine produced
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Quiz me: The preparation and properties of sulphur dioxide
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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
Calculation practice: Calculating the yield of sulphuric acid from sulphur
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Quiz me: The laboratory and industrial preparation of nitrogen
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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.
Spot my mistake: Treating dilute and concentrated nitric acid alike
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Real-life Nigeria: The nitrogen cycle and nitrogen fixation
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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
Calculation practice: Calculating the carbon dioxide released by a mass of limestone
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Chemistry at work: Carbon dioxide in the Nigerian bottling and fire-safety trades
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Quiz me: Temporary hardness and the compounds responsible
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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
Calculation practice: Calculating the amount of softener required
Act as my SS3 Chemistry tutor. Walk me through calculating the amount of softener required
Explain back: Variable oxidation state, and why it arises
I have just studied variable oxidation state, and why it arises in my SS3 Chemistry class.
Calculation practice: Working out the oxidation state in a complex ion
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Real-life Nigeria: Complex ion formation and the ligands involved
Act as my SS3 Chemistry tutor. Show me where complex ion formation and the ligands involve