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heres data

Sample Absorbance Calculated Concentration Mean Concentration unknown A .419 .475 .476 .111 .178 unknown B 179 unknown C 2,165 2.163 2.164 .620 .624 .630 unknown D Concentration of Dye Average Absorbance of replicates Standard Deviation 1 mg/L ,19 2 mg/L 38 3 mg/L 52 4 mg/L . 73 5 mg/L .86 Absorbance 0.02 0.20 0.19 0.39 Table 2.1. Data for methylene blue standard curve Tube # Stock Dye H20 UL Concentration UL of Dye (mg/L) 1 0 2500 0.0 2 500 2000 1.0 3 500 2000 1.0 4 500 2000 1.0 5 1000 1500 2.0 6 1000 1500 2.0 7 1000 1500 2.0 8 1500 1000 3.0 9 1500 1000 3.0 10 1500 1000 3.0 11 2000 500 4.0 12 2000 500 4.0 13 2000 500 4.0 14 2500 0 5.0 15 2500 0 5.0 16 2500 0 5.0 0.36 0.39 0.52 0.50 0.53 0.70 0.73 0.76 0.85 0.88 0.86 Table 2.3 Absorbance of 15 and 20 mg/L methylene blue Concentration Abs 15 mg/L 15 mg/L 20 mg/L 20 mg/L 2.044 1.930 1.926 2.040