Answer Happy

100 mass of beaker and Cu wire, g mass of beaker, g B 6861 mass of copper wire, g mass of beaker and brass, g mass of beaker, g mass of brass, g genin Trass usad percent transmittance of solution of Cu wire, %T₁ absorbance of solution of Cu wire, A₁ percent transmittance of solution of brass, %T₂ absorbance of solution of brass, A₂ mass of Cu in brass sample, g percent copper in brass mean percent copper in brass mean deviation lal+ /bl 2 4.35 6.32 100 1 (Solution 1) 65.50 0.63 (Solution 2) (0.44 65.77 0.675 47.9 % 2.3 65.7% 2.18 0.59 g 43.6% determination 44.2% 2 (Solution 3) 65.52 64.775 0-77 (Solution 4) 67.95 67.15 43.4% 2.36 57.7% 2.24 94.8% 2