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The first cuvette contains de-ionized water.
R2=0.9783
Absorbance for Penny Solution: 0.120
Grams of Copper in Penny
Beer's Law
A=Elc+b
0.120 = 2.646C+0.02914
C=0.03434 mol/L
Concentration(mol/L) x Volume(L) x Molar mass(g/mol) = Mass (g)
0.03434 mol/L x 0.025 L x 63.55 g/mol = 0.0545 g
Mass Percent of Copper
0...
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Class data was reported for mass percent and percent error of copper composition in the penny. The majority of the mass percent was above the appropriate copper mass percent.
Discussion. Based on the mass percent of copper in the samplings of pennies, the fabricator is not putting exactly 2.5% of copper into the planchets...
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