250 prompts matching "The past questions most worth working through"
Exam practice: Single, double and triple covalent bonds
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Practice set: Giant structures and simple molecular structures compared
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Calculation practice: Predicting a substance's structure from its properties
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Practice set: Assigning oxidation numbers in compounds and in ions
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Practice set: Balancing a redox equation by half-equations
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Calculation practice: Balancing a redox equation in acidic solution
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Calculation practice: Comparing metals by a density calculation
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Practice set: Extraction by electrolysis
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Calculation practice: Predicting a non-metal's valency from its group
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Calculation practice: Applying Faraday's first law to a calculation
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Exam practice: Electrolysis and electrochemistry reviewed
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Calculation practice: A mixed set of first-term SS2 chemistry calculations
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Calculation practice: Calculating pH from hydrogen ion concentration
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Calculation practice: Preparing a solution of a stated concentration
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Calculation practice: Using Hess's law to find an unknown enthalpy change
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Practice set: Homogeneous and heterogeneous catalysis
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Exam practice: Measuring rate by volume of gas or by loss of mass
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Calculation practice: Calculating rate from a graph of concentration against time
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Exam practice: Solubility product and sparingly soluble salts
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Calculation practice: Calculating solubility in moles per cubic decimetre
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