Question

How many grams of sucrose are needed to make 875 mL of a 39.0% (w/v) sucrose solution?

Answer 1

39.0% w/v means 39.0 sucrose in 100 mL solution. You want 875 mL; therefore,
39.0g x 875mL/100mL = ? g sucrose for 875 mL soln.

Answer 2

3200