483 prompts matching "Concentrating an ore before extraction"
Chemistry at work: Why chemists use one shared symbolic language
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Explain back: Molar mass and how it is found
I have just studied molar mass and how it is found in my SS1 Chemistry class. Let me expla
Practice set: Converting between mass, moles and number of particles
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Exam practice: The volume one mole of any gas occupies at s.t.p.
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Exam practice: Naming acids and the salts derived from them
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Chemistry at work: Why systematic naming matters in trade and medicine
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Practice set: The Kelvin scale, and converting to it
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Calculation practice: Calculating a new volume after a change of pressure
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Explain back: Standard temperature and pressure
I have just studied standard temperature and pressure in my SS1 Chemistry class. Let me ex
Exam practice: The ideal gas equation and the gas constant
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Explain back: The limiting reagent, and how to identify it
I have just studied the limiting reagent, and how to identify it in my SS1 Chemistry class
Practice set: Calculating the mass of product from the mass of reactant
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Exam practice: Percentage yield, and why it falls short of a hundred
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Spot my mistake: Using an unbalanced equation in a stoichiometry calculation
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Chemistry at work: Empirical and molecular formulae from composition data
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Explain back: What a base is, and what an alkali is
I have just studied what a base is, and what an alkali is in my SS1 Chemistry class. Let m
Practice set: The reactions of acids with metals and with carbonates
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Exam practice: The pH scale and what it measures
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Calculation practice: Calculating the concentration of an acid solution
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Practice set: Making an insoluble salt by mixing two solutions
Act as my SS1 Chemistry tutor. Give me five practice questions on making an insoluble salt