483 prompts matching "Concentrating an ore before extraction"
Explain back: Charles's law stated and illustrated
I have just studied Charles's law stated and illustrated in my SS1 Chemistry class. Let me
Practice set: The pressure law and its graph
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Exam practice: Converting between Celsius and Kelvin
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Explain back: Standard temperature and pressure defined
I have just studied standard temperature and pressure defined in my SS1 Chemistry class. L
Practice set: Molar volume and its value at s.t.p.
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Exam practice: The ideal gas equation and the molar gas constant
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Chemistry at work: Gas calculations in Nigerian industry
Act as my SS1 Chemistry tutor. Explain which Nigerian jobs and industries depend on gas ca
Exam practice: Solubility and the factors that affect it
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Project task: Testing the solubility of common substances
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Practice set: Removing permanent hardness from water
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Exam practice: Where hard water helps, and where it hinders
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Explain back: The properties of bases and of alkalis
I have just studied the properties of bases and of alkalis in my SS1 Chemistry class. Let
Exam practice: The reactions of alkalis with acids and with ammonium salts
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Spot my mistake: Calling every base an alkali
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Calculation practice: Calculating the concentration of an alkali
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Project task: Testing household substances for alkalinity
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Chemistry at work: The uses of bases in Nigerian industry
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Explain back: The pH scale and what its numbers mean
I have just studied the pH scale and what its numbers mean in my SS1 Chemistry class. Let
Practice set: Measuring pH with paper and with a meter
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Spot my mistake: Reading a pH of 7 as meaning no ions are present
Act as my SS1 Chemistry tutor. Show me a worked answer on reading a pH of 7 as meaning no