Какие реагенты правильно подобраны при поражениях: Si→SiO2→Na2SiO3→H2SiO3?
a) O2 , H2O , NaOH; b) O2 , NaOH , HCl;
c) O2 , NaOH , H2O; d) O2 , NaCl , HCl;
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