Determine the percent, by mass, of the indicated element:
Chapter 3, Problem 25(choose chapter or problem)
Determine the percent, by mass, of the indicated element: (a) Pb in tetraethyl lead, once extensively used as an additive to gasoline to prevent engine knocking Pb(C2H5)4 , Cu(C18H33O2)2 . C20H24N2O2 . Cr(NO3)3 # 9 H2O. H2O C(CH3)3CH2CH(CH3)2 . Cu2(OH)2CO3 . C10H22 . (b) Fe in Prussian blue, a pigment used in paints and printing inks (c) Mg in chlorophyll, the green pigment in plant cells
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