Solve IGCSE chemistry extended Topic Questions

1: States of matter
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2: Atoms, elements and compounds
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3: Stoichiometry
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4: Electrochemistry
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5: Chemical energetics
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6: Chemical reactions
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7: Acids, bases and salts
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8: The Periodic Table
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9: Metals
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10: Chemistry of the environment
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11: Organic chemistry
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12: Experimental techniques and chemical analysis
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