the number of water molecules present in a drop of water weighing 0.05mg is
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No. of molecules= (Given mass/Molecular mass)× Avogadro number
(0.05÷18)×6.023×10²³
=1.672×10²² molecules,ie
=16720000000000000000000 molecules
(0.05÷18)×6.023×10²³
=1.672×10²² molecules,ie
=16720000000000000000000 molecules
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