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In the electrolysis of a 0.8000 gram sample of brass, there is obtained 0.0030 gram of PbO , and a deposit of metallic copper exactly equal in weight to the ignited precipitate of Zn P O subsequently obtained from the solution. What is the percentage composition of the brass? !Answers!: 69.75% Cu; 29.92% Zn; 0.33% Pb. !Answer!: 2.48 cc. !Answer!: 0.83 cc. !Answer!: 0.0152 gram.
They must be regarded as approximate, since several disturbing factors and some secondary reactions render difficult their exact application under the conditions of analysis. They are: Zn Cd Fe Ni Pb H Cu Sb Hg Ag SO +0.77 +0.42 +0.34 +0.33 +0.13 0 -0.34 -0.67 -0.76 -0.79 +1.90
Thus avi, "exist;" âvi, "be," in the positive sense of being this or that; afi, "live;" âfi, "breathe." Z is a diminutive; zin, "with," often abbreviated to zn, "combination," "union." Thus znaftau means "those who were brought into life together," or "brethren."
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