Which of the assumptions/postulates that John Dalton made about the atom have been proven to be false?

Can someone me with these questions plz.

How many miles of water are produced if 5.43 mol pbo2 are consumed

Will give ! what are the advantages and disadvantages of nuclear power? check all that apply. one advantage of nuclear energy is that it does not produce carbon dioxide emissions. storage of nuclear waste is a short-term problem associated with nuclear energy. the problem with uranium mining is that a large quantity of uranium must be extracted to meet energy needs because the energy release from uranium fission is so low. safe operation of a nuclear power plant can be jeopardized by a human mistake.