Question

5.0% glucose has a specific gravity of 1.02. what is the mass of 470mL of glucose solution.

Answer 1

I'm confused as to exactly what you want. If you want the mass of the 470 ONLY, it is

1.02 g/mL (is that the unit---you don't list the unit) x 470 mL = ?grams.
If you want the mass of the glucose and the 5% is 5% w/w, then multiply the grams from above x 0.05 = g glucose.