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  1. Please upload notes for ionic, covalent and metallic bindings and also upload the rest of the topics. These are the best of all notes.

  2. there are topics in chemistry which do not open
    1: Purification of substances
    2: Metals
    3: Organic Chemistry
    please make them available ASAP.

  3. A cube of wood has a volume of 0.2cm3 and density of 600kg/m3. It is then placed in a liquid of 800kg/m3 density.
    What fraction of the volume of the wood would be inmersed in the liquid?

  4. An alloy of copper and tin has volume of 100ml. The density of copper is 8.90g/ml and of tin is 7.30g/ml while of alloy is 7.62g/ml. What is the volume of each metal?


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