Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. it is also a component of cigarette smoke. pyridine ionizes in water as follows: c5h5n+h2o⇌c5h5nh++oh− the pkb of pyridine is 8.75. what is the ph of a 0.230 m solution of pyridine?

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).

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day