365 prompts matching "Working out relative molecular mass from a formula"
Exam practice: The action of soap in hard water
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Spot my mistake: Expecting a detergent to fail in hard water as soap does
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Quiz me: Natural dyes and synthetic dyes compared
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Explain back: The chromophore, and why a dye is coloured
I have just studied the chromophore, and why a dye is coloured in my SS3 Chemistry class.
Exam practice: Mordants and the fixing of a dye
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Spot my mistake: Assuming every coloured substance is a dye
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Calculation practice: Calculating the quantity of dye needed for a given fabric
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Quiz me: The electrochemical explanation of rusting
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Explain back: The factors that speed up rusting
I have just studied the factors that speed up rusting in my SS3 Chemistry class. Let me ex
Exam practice: Galvanising, sacrificial protection and cathodic protection
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Spot my mistake: Describing painting as a chemical method of rust prevention
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Quiz me: The sources of each major pollutant in Nigeria
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Explain back: Acid rain, its chemistry and its effects
I have just studied acid rain, its chemistry and its effects in my SS3 Chemistry class. Le
Exam practice: Heavy metal pollution and its effects on health
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Spot my mistake: Treating carbon dioxide as a toxic pollutant
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Calculation practice: Interpreting pollutant concentration data
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Quiz me: Coagulation, sedimentation and filtration
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Explain back: Chlorination and the alternatives to it
I have just studied chlorination and the alternatives to it in my SS3 Chemistry class. Let
Exam practice: Distillation, reverse osmosis and desalination
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Calculation practice: Calculating the dose of a treatment chemical
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