246 prompts matching "Confusing mass number with relative atomic mass"
Exam practice: The configuration of an ion compared with that of its atom
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Practice set: Converting between mass, moles and particles
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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: Using pressure in millimetres of mercury with R in SI units
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Spot my mistake: Reading a solubility curve without checking the units
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Calculation practice: Calculating the mass crystallising out on cooling
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Calculation practice: Calculating the mass of salt obtainable
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Exam practice: Substitution with halogens, and the mechanism in outline
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Calculation practice: Calculating the mass of product in an addition reaction
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Explain back: Reduction with carbon, and when it works
I have just studied reduction with carbon, and when it works in my SS3 Chemistry class. Le
Calculation practice: Calculating the mass of iron from a mass of haematite
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Calculation practice: Calculating the mass of ammonia from nitrogen and hydrogen
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Calculation practice: Calculating the carbon dioxide released by a mass of limestone
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Project task: Demonstrating the carbon dioxide test with limewater
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Calculation practice: Calculating the molar mass of a simple peptide
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Teach me: What qualitative analysis sets out to find
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Quiz me: The preliminary tests carried out on an unknown salt
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Spot my mistake: Adding excess reagent too early and losing a precipitate
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Chemistry at work: Recording observations and inferences in the WAEC format
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