Question

A. A sample of pure water, whatever the
source always contains
by
mass of oxygen and 11.1 % by mass of
hydrogen.
a. 88.8 b. 18 c. 80 d. 16​

Answer 1

Answer:

Explanation:'The number of waves made by a bohr electron in one complete revolution in 3rd orbit?'

I don't want the answer..... Can anyone please explain this question to me and tell me that does wave in this question mean spectral lines?