If calcium oxide (CaO) is added to glass to break 20% of the bonds between oxygen atoms in the silica (SiO₂) matrix and reduce the melting point. If we assume each calcium ion will break two oxygen connections within the glass structure, what is the right weight percent of calcium oxide to add to the silica? The atomic masses of the elements are: O-16 amu; Si-28 amu; Ca 40 amu.

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To determine the weight percent of calcium oxide CaO needed to break 20 of the bonds between oxygen ... View the full answer