A transition in the Balmer series for hydrogen has an observed wavelength of 434 nm. What is the energy of this transition in kJ/mole

The correct answer is:   bri hope this answer was ! : )

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).