500 prompts matching "How a catalyst lowers the activation energy"
Chemistry at work: How Mendeleev's table predicted undiscovered elements
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Exam practice: Chromatography and how it works
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Practice set: Hard and soft water, and the causes of hardness
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Exam practice: The laboratory preparation of hydrogen
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Practice set: The properties and uses of oxygen
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Exam practice: Combustion and the conditions it requires
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Spot my mistake: Treating air as a compound rather than a mixture
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Chemistry at work: The uses of the gases separated from air
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Exam practice: The periodic table and separation techniques reviewed
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Spot my mistake: The errors most often made in second-term SS1 Chemistry
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Real-life Nigeria: Preparing a revision plan for the SS1 second term
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Practice set: The electrolysis of acidified water
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Exam practice: The factors that determine which ion is discharged
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Spot my mistake: Confusing the anode with the cathode
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Exam practice: Identifying the oxidising and the reducing agent in a reaction
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Spot my mistake: Assigning an oxidation number to the wrong atom
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Quiz me: Ionic bonding and how it forms
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Exam practice: Metallic bonding and the properties it gives
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Real-life Nigeria: Bonding and the properties of Nigerian building materials
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Spot my mistake: Giving an exothermic change a positive enthalpy
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