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What is Avogadro's Number and how it is related with atomic mass unit and how can we say that mass of one atom of carbon = 12/Na??? Please explain me with examples.
Updated Tue, 21 May 2019 02:20 pm

A solution of sodium sulfate contains \(92 \text {g of } \mathrm{Na}^{+}\) ions per kilogram of water. The molality of \(\mathrm{Na}^{+}\) ions in that solution in mol \(kg^{-1}\) is :
(a) 16
(b) 8
(c) 4
(d) 12
Updated Thu, 16 May 2019 11:37 am