Calculate the number of atoms present in 56 mL of Oxygen molecule at STP
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22400 mL in O2 ---------------6.022×20^23
56 mL in O2 -------------------- (?)
56×6.022×10^23
_____________
22400mL
=0.01×10^23
56 mL in O2 -------------------- (?)
56×6.022×10^23
_____________
22400mL
=0.01×10^23
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