O.O.O.O.[N+:5]([O-:8])([O-:7])=[O:6].[Ca+2:9].[N+:10]([O-:13])([O-:12])=[O:11]>O>[N+:5]([O-:8])([O-:7])=[O:6].[Ca+2:9].[N+:10]([O-:13])([O-:12])=[O:11]1.470 grams of calcium nitrate tetrahydrate are dissolved in de-ionised water and the solution is made up to 1 liter;
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