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An economical substitute for vitreous silica is a high-silica glass made by leaching the B2O3-rich phase from a two-phase borosilicate glass. (The resulting porous microstructure is densified by heating.) A typical starting composition is 81 wt % SiO2, 4 wt % Na2O, 2 wt % Al2O3, and 13 wt % B2O3. A typical final composition is 96 wt % SiO2, 1 wt % Al2O3, and 3 wt % B2O3. How much product (in kilograms) would be produced from 50 kg of starting material, assuming no SiO2 is lost by leaching

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Answer:48kg of SiO2, 0.5kg of Al2O3, and 1.5kg of B2O3

Will be the final product

Explanation:

I) 96wt% of SiO2 will amount to 96/100*50 = 0.96*50=48kg of SiO2

ii) 1wt% of Al2O3 will amount to 1/100*50 = 0.01*50=0.5kg of Al2O3

III) 3wt% of B2O3 will amount to 3/100*50 = 0.03*50=1.5kg of B2O3..

The overall product form 48+ 0.5+1.5= 50kg

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