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Sidkaf
@Sidkaf
August 2021
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Составьте уравнения хим. реак. водорода с
H2+NiO=
H2+Br2=
H2+Ca=
H2+CrO3=
И
задачки
Дано:
m(раствора)=300г
w(в.)=30%
выпарили
m(H2O)=50г
Найти:
w(в.)-?
Дано:
m(в.)=10г
m(р-ра)=200г
добавили
m(в.)=30г
Найти:
w(в)2-?
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