Предмет: Химия, автор: DannyIva

ПОМОГИТЕ ПОЖАЛУЙСТА
1)Валентность и степень окисления атома углерода в молекуле пропана равны соответственно : а) 1 , -8 б) 2,-8 в) 4 , -8/3 г) 4, +8/3

2) Степень окисления +3 атомы хрома имеют в веществе , обозначенном формулой : а)Cr(NO3)2 б) Cr(SO4)3 в) K2Cr2O7 г)Na2CrO4

3)Степень окисления азота в веществе, формула которого (NH4)2SO4 равна ....?

Ответы

Автор ответа: Grassator

В первом в
Во втором б
В третьем -3

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