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flowerly
@flowerly
July 2022
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Вычислите массовую долю (в %) кислорода в сульфите калия.
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svetka1574
Verified answer
Mr(K2SO3) = 39*2+32+16*3 = 158
W(O) = Ar(O) * n / Mr(K2SO3) *100% = 16*3 / 158 *100% =30%
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flowerly
а почему 16*3?
svetka1574
3 атома кислорода на атомную массу кислорода
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Answers & Comments
Verified answer
Mr(K2SO3) = 39*2+32+16*3 = 158W(O) = Ar(O) * n / Mr(K2SO3) *100% = 16*3 / 158 *100% =30%