500 prompts matching "How coal was formed, and the ranks of coal"
Exam practice: Mass-to-volume and volume-to-volume calculations
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Practice set: Reading values and crystallisation from a curve
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Spot my mistake: Reading a solubility curve without checking the units
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Real-life Nigeria: Fractional crystallisation and purification
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Exam practice: The titration curve for each acid-base combination
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Chemistry at work: PH control in Nigerian food and water industries
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Real-life Nigeria: Hydrolysis and soil pH in Nigerian farming
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Practice set: Isomerism among the alkanes
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Spot my mistake: Writing an isomer that is really the same molecule
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Chemistry at work: Alkanes as feedstock for the petrochemical industry
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Exam practice: The test that distinguishes saturated from unsaturated
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Chemistry at work: Alkenes in the Nigerian plastics industry
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Chemistry at work: Alcohols and acids in Nigerian food and drink industries
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Practice set: Extraction by electrolysis, and when it is necessary
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Real-life Nigeria: Refining and purifying an extracted metal
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Chemistry at work: Mining and metallurgy as careers in Nigeria
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Spot my mistake: Naming coke as the substance that removes the impurities
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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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Exam practice: Nitric acid, its manufacture and its reactions
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