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We can add CaO to SiO 2 glass to disrupt bonding of 20% of the oxygen atoms to weaken the network of Si-O tetrahedra. When

We can add CaO to SiO2 glass to disrupt bonding of 20% of the oxygen atoms to weaken the network of Si-O tetrahedra. When we make this addition, each calcium ion will result in 2 broken oxygen connections. Calculate the weight percent of CaO we should add to SiO2 to achieve this. The atomic masses of the elements are: O-16 amu; Si-28 amu; Ca 40 amu.

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