I want 2 3 and 4

I want 2 3 and 4 I . Define: O >r€elative atomic mass 3, Atomic mass _S) Gram moleculør •nass Valency of an elem"t 2. Calculate the percentage ComPOSition of carbon and Oxygen masses : Carbon and oxygen 16) CO.. (given atomic -3. A student has a Piece Of COPPerSUlphate (CuSOa) crystal. Explain the method of calculating the number of CuS04 molecules in that crystal. (Gi'€n atomic masses: Calcium —40, Sulphur = 32 and Oxygen' 16' Heat 4. ———.CaO + CO t From the above Calculate the amount Of carbon dioxide in grams liberated by heating 25 g of calcium carbonate.

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