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A brief History of the US ( ) Penny Composition
www.csus.eduPercent Composition of Zinc and Copper in US Pennies: The current US penny is made of metallic copper (Cu) plated onto a zinc (Zn) core. In an object composed of multiple materials (like a penny), the density (d) is a weighted average of the densities of the pure substances that make up the object. Also assume that
11. Empirical Formula Worksheet II - chemunlimited.com
chemunlimited.comEMPIRICAL AND MOLECULAR FORMULA WORKSHEET An oxide of chromium is found to have the following % composition: 68.4 % Cr and 31.6 % O. Determine this compound's empirical formula. The percent composition of a compound was found to be 63.5 % silver, 8.2 % nitrogen, and 28.3 % oxygen. Determine the compound's empirical formula.