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.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%

fe 55.85 g/mol and h2o 18.02 g/mol.