Calculate the number of calcium ions which are present in 0.0056 g of calcium oxide.
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Answer:
given weight =0.0056g
molecular mass =40+16=56
moles of ca+ ion=0.0056/56=0.0001
1 mole =6.02*10^23
0.0001 mole =0.0001*6.02*10^23
=6.02*10^19
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