Question

ignore the std uncertainty.

I need help calculating the mass of Cu g from the concentraion of Cu mg/mL. use infromation provided

STOCK CONCENTRATION: [Cu] = 0.2 mg culme CALIBRATION CURVE standard 2 סו STANDARD CU SOLUTIONS volume of stock used, mL [Cu] in standard, mg/mL absorbance standard 1 s. 0.004 0.240 0.008 0.421 standard 3 15 0.012 0.634 Prepare and include a graph of absorbance vs. [Cu] in mg/mL in the standard solutions. Do a lin- ear regresssion on the data and report the regression parameters and their errors: m b иь Sy 72 10.0377/0.01995 0.01306 0.9978 um 49.25 2.309 UNKNOWN #: 70 UNKNOWN ANALYSIS mass of brass trial 1 10.2854 o.uss 10.0085 trial 2 10.2941 10.531 10.01oo trial 3 0.2758 0.5o2 0.0094 absorbance [Cu] mg/mL std uncertainty (use Eq. 4-27) mass of Cu (g) Cu % (wt/wt) in brass average of Cu % (wt/wt) in brass