Common salt obtained from sea water contains 96% NaCl by
mass . The approx.. number of molecules present in 10g of the
salt is ?
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Answer:
100 g salt contains 95g NaCl
Therefore, 10g salt contains 9.5g NaCl
no. of molecules =(moles of NaCl) ×6.02×10
23
=
58.5
9.5
×6.02×10
23
= 10
23
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