Question

Fructose, which is the predominant sugar in fruit juice, contains exactly 368 Cal for 100 grams of fructose. Aglass with 296 mL (10.fl oz.) of apple juice has 180. Cal. If 150. of those Cal are from fructose, what is the molarity of the fructose (180.16 g/mol) in the juice solution? Assume all numbers are significant to the ones place. M fructose

Answer 1

100g of fructose have 368 calories.

So gram of fructose for 150 calories = 150× 100/368 = 40.76gram of fructose in the glass

Moles of fructose in the glass = 40.76/ 180.16 = 0.22 moles in the glass

Molarity of fructose in glass = 0.22/ 0.296 = 0.77 M