I want 2 3 and 4 I . Define:
O >r€elative atomic mass 3,
_S) Gram moleculør •nass
Valency of an elem"t
2. Calculate the percentage ComPOSition of carbon and Oxygen
: 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'
4. ———.CaO + CO t
From the above Calculate the amount Of carbon dioxide in
grams liberated by heating 25 g of calcium carbonate.