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E Watch The E × -w11 Dir Digital Reso × e Solved: A B: × Secure https://digital.wwnorton.com/17185 (49) Riha × G Chemistry q ×/ Smartwork5 × G Fructose, wr tin 1st attempt See Periodic Table QSee Hint Fructose, which is the predominant sugar in fruit juice, contains exactly 368 Cal for 100 grams of fructose. A glass with 296 mL(10n. 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 6:33 PM Type here to search 1/26/2018

Explanation / Answer

100 grams of fructose gives 368 cal

So the amount of fructose that gives 150 cal will be :

= ( 150 x 100) / 368

= 40.76 grams

Number of moles of fructose = given mass / molar mas

= 40.76 / 180.16

= 0.226 mol

Molarity = no. of moles of fructose / volume of solution in L

so putting all the values we get :

= 0.226 / 0.296

= 0.764 M fructose

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