Work Step by Step
Number of moles of $SiO_2$: $11.64\ g\div 60.08\ g/mol=0.194\ mol$, $0.194\ mol$ of Si Number of moles of water: $6.980\ g\div 18.015\ g/mol=0.387\ mol$, $0.775\ mol$ of H Ratio: $4.00$ $SiH_4$
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