Here's what I got.
A solution's mass by volume percent concentration is calculated by looking at how many grams of solute you get for every
In this case, you know that
How about a solution that contains
#100 color(red)(cancel(color(black)("mL solution"))) * overbrace("1 g solute"/(50color(red)(cancel(color(black)("mL solution")))))^(color(blue)("known composition")) = "2 g solute"#
This means that the solution is