Answer:
Molar mass of \[N{{a}_{2}}C{{O}_{3}}=106\,gmo{{l}^{-1}}\]
\[\therefore \]\[0.5\,mol\,N{{a}_{2}}C{{O}_{3}}\] weighs 53
g. On the other hand, 0.5 \[M\,\,N{{a}_{2}}C{{O}_{3}}\] means 0.5 moles of \[N{{a}_{2}}C{{O}_{3}}\]
is dissolved in one litre of solution.
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