500 prompts matching "How a catalyst lowers the activation energy"
Practice set: Predicting valency from the group number
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Exam practice: The properties of Group 1, Group 7 and Group 0
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Spot my mistake: Placing hydrogen wrongly in the periodic table
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Real-life Nigeria: The elements Nigeria mines, and where they sit in the table
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Spot my mistake: Showing electron transfer in a covalent compound
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Chemistry at work: Metallic bonding and the sea of electrons
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Practice set: How structure determines melting and boiling point
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Real-life Nigeria: Hydrogen bonding and the behaviour of water
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Chemistry at work: Structure and the design of Nigerian building materials
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Practice set: The pressure law and its graph
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Spot my mistake: Leaving the temperature in Celsius in a gas calculation
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Real-life Nigeria: The gas laws in Nigerian tyres and cylinders
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Exam practice: The ideal gas equation and the molar gas constant
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Spot my mistake: Using the wrong value of R for the units given
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Real-life Nigeria: Graham's law of diffusion and the uses made of it
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Exam practice: Solubility and the factors that affect it
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Real-life Nigeria: The water cycle and its importance
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Chemistry at work: The laboratory tests for water
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Spot my mistake: Treating every kind of hardness with the same method
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Practice set: The preparation of a named alkali
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