Ion Fe3+ tác dụng với hỗn hợp dung dịch NH4OH cho kết tủa màu nâu đỏ, kết tủa là gì

The air is going to come out because of the low pressure.

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).