CH 7 HOMEWORK

A sample of brass contains by mass 28.0% zinc and 72.0% copper. How many kilograms of brass could be produced from 6.00 kilograms of copper? ... What are the empirical and molecular formulas of a compound if 212.1g of the compound contains 42.4g of hydrogen and 169.7g of carbon. The formula mass of the compound is 30.0 g/mol. ... Watch sig figs ... ................
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