Alabel from a carton of orange juice is given above. it states that one serving, 12 fluid ounces (355 ml, the volume of a can of soda), provides 108 mg vitamin c, which is 120% of the recommended daily allowance (rda), based on a 2000 calorie diet. (a). how many dietary calories are present in one serving? (b). what is the the recommended daily allowance (rda) of vitamin c? useful information: 1 g carbohydrate contains = 4.0 dietary calories.

When preparing a tlc slide of a reference standard material (rsm), a solvent or mixture of solvents is used to dissolve the rsm and transfer it into the tlc plate. how does its polarity affects the rf of the rsm? the rf will increase depending of it polarity, but never decrease it does not affects it since the solvent evaporates before the insertion of the tlc slide in the jar a polar solvent will definitively reduce the retention factor a polar solvent will increase rf