Calculate the frequency of the n = 3 line in the lyman series of hydrogen.

Based on the calculation from Rydberg equation of Spectral Series emissions, The frequency of the n = 3 line in the Lyman series of Hydrogen will be : 
103 nanometers

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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).