500 prompts matching "How a catalyst lowers the activation energy"
Chemistry at work: Deciding which optional questions to attempt
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Practice set: Writing s, p and d electron configurations
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Spot my mistake: Explaining a group trend by nuclear charge alone
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Practice set: Dative covalent bonding and where it occurs
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Exam practice: Metallic bonding and hydrogen bonding
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Spot my mistake: Describing a polar covalent bond as ionic
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Practice set: Converting between mass, moles and particles
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Exam practice: Concentration expressed in moles per cubic decimetre
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Spot my mistake: Using molar volume for a substance that is not a gas
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Practice set: Mass-to-mass calculations
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Exam practice: Mass-to-volume and volume-to-volume calculations
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Spot my mistake: Reading a mole ratio off an unbalanced equation
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Real-life Nigeria: Stoichiometry in scaling up a reaction
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Chemistry at work: Stoichiometry in Nigerian chemical manufacturing
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Practice set: Dalton's law of partial pressures
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Exam practice: Graham's law of diffusion
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Spot my mistake: Using pressure in millimetres of mercury with R in SI units
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Chemistry at work: Gas law calculations in Nigerian industry
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Practice set: Reading values and crystallisation from a curve
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Exam practice: Solubility expressed in different units
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