Ответ:
Объяснение:
Mr(Na2S) = 23*2 + 32 = 78
W(Na) = Ar(Na) *n / Mr(Na2S) *100% = 23*2 / 78 *100% =59 %
W(S) = Ar(S) *n / Mr(Na2S) *100% = 32 *1 / 78 *100% =41%
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Ответ:
Объяснение:
Mr(Na2S) = 23*2 + 32 = 78
W(Na) = Ar(Na) *n / Mr(Na2S) *100% = 23*2 / 78 *100% =59 %
W(S) = Ar(S) *n / Mr(Na2S) *100% = 32 *1 / 78 *100% =41%