A solution is made by dissolving 29 g of sodium chloride to a final volume of 202 mL solution. What is the mass/volume % of the solute?
This means that in order to find your solution's mass by volume percent concentration, you need to figure out how many grams of solute, which in your case is sodium chloride,
At that point, you can tag along a
Notice that the problem tells you that your solution contains
#100 color(red)(cancel(color(black)("mL solution"))) * "29 g NaCl"/(202color(red)(cancel(color(black)("mL solution")))) = "14.356 g NaCl"#
Since this is how many grams of solute you get in
#"% m/v NaCl" = color(green)(|bar(ul(color(white)(a/a)color(black)(14.3%)color(white)(a/a)|)))#
I'll leave the answer rounded to three sig figs, but keep in mind that you have two sig figs for the mass of sodium chloride.