250 prompts matching "Using the wrong value of R for the units given"
Exam practice: The extraction of iron in the blast furnace
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Calculation practice: Calculating the mass of metal obtainable from an ore
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Exam practice: The halogens as a family of non-metals
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Exam practice: The electrolysis of molten and of aqueous compounds compared
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Chemistry at work: Preparing a revision plan for the SS2 first term
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Exam practice: The hydrolysis of salts and the pH that results
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Exam practice: The procedure for a standard acid-base titration
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Spot my mistake: Rinsing the burette with water before filling it
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Exam practice: Finding the concentration of an unknown alkali
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Calculation practice: Calculating the purity of a sample from titration data
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Chemistry at work: The accuracy demanded of an analytical chemist
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Exam practice: The energy profile diagram and activation energy
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Exam practice: The effect of temperature on the position of equilibrium
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Calculation practice: Writing and using the equilibrium constant expression
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Chemistry at work: Equilibrium in the contact process for sulphuric acid
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Exam practice: The tests for water purity
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Calculation practice: Calculating the mass of washing soda needed to soften water
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Spot my mistake: Blaming ozone depletion for the warming that greenhouse gases cause
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Real-life Nigeria: Preparing a revision plan for the SS2 second term
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Exam practice: The IUPAC rules for naming straight-chain hydrocarbons
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