August 2022 1 5 Report

Вычислите массовую долю серы в следующих соединениях:

а) Na2So4 Mr (Na2So4) =     w(S) =

б) SOз Mr (SOз) =      w (S) =

в) CuS Mr (CuS) =     w(S) =

г) H2SOз Mr (Na2SOз)=     w (S) =

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