Предмет: Химия, автор: 123Пеппа321

Для приготовления 10 мл раствора с массовой долей 40 % (плотностью 1,4 г/мл) необходимая масса гидроксида калия равна:
а)8,4 г
б)5,6 г
в)4 г
д)40 г

Ответы

Автор ответа: daryafoxisdaryafoxis
0
б)5,6 г

m = Vp
m (р-ра) = 10*1,4 = 14 г
m(KOH) = 14*0,4 = 5,6
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