250 prompts matching "Graphite in Nigerian pencils and electrodes"
Practice set: The standard enthalpies of combustion and of neutralisation
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Exam practice: The energy profile diagram and activation energy
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Spot my mistake: Omitting the sign of an enthalpy change
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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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Spot my mistake: Saying a catalyst changes the position of equilibrium
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Calculation practice: Calculating rate from a graph of concentration against time
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Practice set: The effect of concentration and of pressure on equilibrium
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Spot my mistake: Claiming a catalyst shifts the position of equilibrium
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Real-life Nigeria: Equilibrium in the Haber process
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Practice set: The solubility curve, and how to read it
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Spot my mistake: Reading a solubility curve at the wrong temperature
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Calculation practice: Calculating solubility in moles per cubic decimetre
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Quiz me: What causes temporary and what causes permanent hardness
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Spot my mistake: Proposing boiling as a cure for permanent hardness
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Calculation practice: Calculating the mass of washing soda needed to soften water
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Quiz me: The major air pollutants and where they come from
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Exam practice: Ozone depletion and its causes
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Spot my mistake: Blaming ozone depletion for the warming that greenhouse gases cause
Act as my SS2 Chemistry tutor. Show me a worked answer on blaming ozone depletion for the