For the following exercise, let us work with 180 g of Proust's compound. We are supposing that 180 g of compound yields 10 g H2O, 46 g CO2, 100 g Cu, and 25 g "additional" O (that is, oxygen not in water or carbon dioxide).
a) Compute the number of moles of H2O, CO2, Cu, and additional O. Express the molar proportions as a ratio of small whole numbers.
b) Compute the number of moles of Cu, C, H, and O (total). What is the empirical formula of Proust's compound?
c) The empirical formula gives the proportions of elements in a compound, but does not tell us how the elements are arranged into groups. The ions that make up this compound are actually Cu2+, CO32- ions, and OH- ions. That is, we can write its formula as Cux(CO3)y(OH)z. Write the compound's formula in this way, filling in x, y, and z.
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