500 prompts matching "Calculating the mass of iron from a mass of ore"
Exam practice: Ionisation and the formation of cations and anions
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Chemistry at work: Electron configuration and the design of new materials
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Explain back: The state symbols and what each of them means
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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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Explain back: Covalent bonding and the sharing of electrons
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Calculation practice: Predicting a compound's formula from the bonding type
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Chemistry at work: Metallic bonding and the sea of electrons
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Project task: Comparing the properties of four given substances
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Chemistry at work: Structure and the design of Nigerian building materials
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Spot my mistake: Using the wrong value of R for the units given
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Calculation practice: Finding the volume of a gas under new conditions
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Project task: Measuring the volume of a gas produced in a reaction
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Explain back: The sources of water in Nigeria
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Project task: Testing the solubility of common substances
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Spot my mistake: Treating every kind of hardness with the same method
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Calculation practice: Comparing soap lather as a measure of hardness
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Project task: The treatment a town's water passes through before supply
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Explain back: The properties of bases and of alkalis
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Exam practice: The reactions of alkalis with acids and with ammonium salts
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