How many atoms of oxygen are present in 3.42g of C12H12O11 ?
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3.42/342=0.01
=0.01×12×6.022×10^23
= 0.12×6.022×10^23
ans=0.72264×10^23
=0.01×12×6.022×10^23
= 0.12×6.022×10^23
ans=0.72264×10^23
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