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Аленаат
@Аленаат
March 2022
1
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сколько граммов соды содержится в 200 граммах 5% раствора?
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zhenyaschipov
M(NaCO3)=200x5/100=10 г
m(H2O)=200-10=190 г
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Аленаат
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m(H2O)=200-10=190 г