Chemistry
posted by Sherryl on .
A student placed 14.0 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 sample of this glucose solution was diluted to 0.500 . How many grams of glucose are in 100. of the final solution?

What are the units for crying out loud?
Are all of them 100 mL. I will assume that is what you meant except for the dilution which I assume is 0.500 L or 500 mL.
14 g/100 = 0.14 g/mL
You took 55 mL of that so you have in the aliquot of 55 mL exactly 0.14 g/mL x 55 mL = 7.70 g. Now you put that 7.70 g into 500 mL so you now have 7.70 g/500 mL = 0.0154 g/mL. If you want the amount in 100 mL it is just 100 x that. Check my thinking.