In order to compute the mass of each solute in the sample, we simply multiply the percentage mass of each solute with the total mass of the solution. This is ad such: Mass (NaCl) = 0.0486 x 294 Mass (NaCl) = 14.29 grams
Mass(Na₂CO₃) = 0.0754 x 294 Mass(Na₂CO₃) = 22.17 grams