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2014-09-25T22:09:43+03:00
NaOH + HNO3 ---> NaNO3 + H2O
40 g NaOH........85 g NaNO3.........1 mol H2O
x g NaOH...........420 g NaNO3..........y moli H2O
x =197,64 g NaOH
y = 4,941 moli H2O