500 prompts matching "Calculating the mass crystallising out on cooling"
Practice set: Sublimation as a method of separation
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Teach me: The subatomic particles and the charge each carries
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Real-life Nigeria: Radioactive isotopes and their uses in Nigeria
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Chemistry at work: The historical models of the atom compared
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Practice set: Valency deduced from electron configuration
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Calculation practice: Deducing valency from a given configuration
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Real-life Nigeria: Why some elements react vigorously and others hardly at all
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Teach me: Why chemists use symbols rather than words
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Quiz me: The symbols for the first thirty elements
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Practice set: Writing the formulae of simple binary compounds
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Real-life Nigeria: Reading chemical formulae on Nigerian packaging
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Teach me: What a chemical equation represents
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Quiz me: Word equations and chemical equations compared
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Practice set: Writing an equation from a described reaction
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Exam practice: Balancing an equation by inspection
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Calculation practice: Checking that an equation balances by counting atoms
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Real-life Nigeria: Equations for reactions seen in Nigerian daily life
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Chemistry at work: Why balanced equations matter in industry
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Practice set: Ionic equations for precipitation reactions
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Exam practice: Ionic equations for neutralisation
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